*** An
Inventory of the Collection, arranged alphabetically,
and containing fuller information than this Guide, can
be obtained at the Catalogue Stall, Price
Sixpence.
The idea of the Food Collection
(originally formed in 1857), now removed from the South
Kensington Museum and arranged in the lower Gallery on the North
side of the Branch Museum at Bethnal Green was suggested by
Thomas Twining, Esq., of Twickenham, as part of a plan for the
establishment of an Economic Museum that should comprise
illustrations of every-day life for the working classes.
The Food Collection was at the commencement of its formation
carried on under the direction of Dr. Lyon Playfair, M.P., and,
as now constituted, has been arranged with the express object of
teaching the nature and sources of the food which rich and poor
alike need for the maintenance of their daily life.
Considerable progress has been made in carrying out this design,
and the present brief Guide is intended as an introduction to the
general principles and plan upon which the Collection has been
arranged. Two great objects have been kept in view in the
Collection:—
First, to represent the chemical compositions of the various
substances used as food; and, secondly, to illustrate the natural
sources from which the various kinds of food have been
obtained. Where the processes of the preparation of food
admit of illustration, these are also exhibited.
There are many methods by which such a Collection might be
arranged; but the Chemical Composition of Food has recently been
discovered to have so close a connexion with its action on the
system, that it has been deemed advisable to follow a Chemical
arrangement. All food is found to be composed of the
same materials or elements as the Human Body. The necessity
of the supply of food from day to day depends on the fact, that
the elements of the human body are daily wasted by the processes
of life. As a fire cannot burn without a supply of
fuel, neither can the human body live without its
daily supplies of food.
Not only does food supply the daily waste of the human body,
but, as the body increases in size from birth to adult age, it is
supplied with materials for this increase by the aid of
food. In order, therefore, to understand the value of food
from its composition, it is necessary to know the composition of
the human body. Just as any other compound substance can be
submitted to chemical analysis and the elements of which it
consists ascertained, so can the composition of the human body be
discovered. Such analyses of course become difficult in
proportion to the complication of the body analysed, and only an
approach to the true quantities in which the elements exist can
be expected. In Case No. 1, Division A., the
results of such an analysis have been attempted, and the
quantities of each element entering into the composition of a
human body weighing 11 stone or 154 pounds are (as far as
possible) presented to the eye.
The following are the elements and their
quantities:—
|
lbs.
|
ozs.
|
grs.
|
1. Oxygen, a gas. The quantity
contained in the body would occupy a space equal to 1,314 cubic
feet
|
111
|
0
|
0
|
2. Carbon, a solid. When obtained
from animals it is called animal charcoal
|
21
|
0
|
0
|
3. Hydrogen, a gas. The lightest body
in nature. The quantity present would occupy about 2,622
cubic feet
|
14
|
0
|
0
|
4. Nitrogen, a gas. It would occupy,
when free, about 46 cubic feet
|
3
|
9
|
0
|
5. Calcium, a solid. The metallic base
of lime which has not yet been obtained in sufficient quantity to
be employed in the arts. It is about the density of
aluminium
|
2
|
0
|
0
|
6. Phosphorus, a solid. This substance
is so inflammable that it can only be kept in water
|
1
|
12
|
190
|
7. Chlorine, a gas. When combined with
sodium it forms common salt
|
0
|
2
|
382
|
8. Sulphur, a solid. A well-known
substance. It unites with hydrogen, forming sulphuretted
hydrogen, which gives the unpleasant smell to decomposing animal
and vegetable matter
|
0
|
2
|
219
|
9. Sodium, a metal. It is so light that
it floats on water, and is kept in naphtha to prevent its
oxidation
|
0
|
2
|
116
|
10. Fluorine, a gas. This substance has
not been separated in such a manner as to permit of an
examination of its properties, and cannot be exhibited. It
is found united with calcium in the bones
|
0
|
2
|
0
|
11. Potassium, a metal. Like sodium it
floats on water, and burns with a flame when placed on it
|
0
|
0
|
290
|
12. Iron, a metal. In small quantities
it is necessary to the health of the body
|
0
|
0
|
100
|
13. Magnesium, a metal. Combined with
oxygen it forms magnesia
|
0
|
0
|
12
|
14. Silicon, a non-metallic substance.
With oxygen it forms silex or silica. It enters into the
composition of the teeth and hair
|
0
|
0
|
2
|
|
154
|
0
|
0
|
Other elements have been found in the body, as copper and
manganese, but these are probably accidental.
These elements, when combined together, form a set of compound
bodies called “proximate principles,” out of which
the tissues and fluids of the body are formed.
|
lbs.
|
ozs.
|
grs.
|
1. Water, composed of oxygen and hydrogen
gases
|
111
|
0
|
0
|
2. Gelatin, of which the walls of the cells
and many tissues of the body, as the skin and bones, are
principally composed
|
15
|
6
|
0
|
3. Fat, which constitutes the adipose
tissue
|
12
|
0
|
0
|
4. Phosphate of Lime, forming the principal
part of the earthy matter of the bones
|
5
|
13
|
0
|
5. Fibrin, forming the muscles and the clot
and globules of the blood
|
4
|
4
|
0
|
6. Albumen, found in the blood and nerves
|
4
|
3
|
0
|
7. Carbonate of Lime, also entering into the
composition of bone
|
1
|
0
|
0
|
8. Chloride of Sodium, common salt
|
0
|
3
|
376
|
9. Fluoride of Calcium, found in the
bones
|
0
|
3
|
0
|
10. Sulphate of Soda
|
0
|
1
|
170
|
11. Carbonate of Soda
|
0
|
1
|
72
|
12. Phosphate of Soda
|
0
|
0
|
400
|
13. Sulphate of Potash
|
0
|
0
|
400
|
14. Peroxide of Iron
|
0
|
0
|
150
|
15. Phosphate of Potash
|
0
|
0
|
100
|
16. Phosphate of Magnesia
|
0
|
0
|
75
|
17. Chloride of Potassium
|
0
|
0
|
10
|
18. Silica
|
0
|
0
|
3
|
|
154
|
0
|
0
|
These compounds, in passing away from the body, form many
others, which may be here left out of consideration as not
forming a necessary part of the fabric of the human body.
None of these constituents of the body remain permanently in
the system, and whilst the old particles are being removed new
ones are supplied by the food. It is calculated that in
this way a quantity of material, equal to the weight of the whole
body, is carried away every forty days. So that we may be
said to moult or cast away our old body and get a new one every
forty days.
The materials for the food of man, and containing the above
elements, are derived from the mineral, vegetable, and animal
kingdoms. The vegetable kingdom, however, is the great
source of food to man and animals, as it is in the cells of the
plant that the elements undergo those chemical changes which fit
them for food. The animal can only supply what it
obtains from them, and the substances supplied by the animal
kingdom as food are identical with those obtained from
plants.
The Food Collection is arranged as
nearly as possible in the order of the following Classification, commencing at the western
end of the lower gallery.
Group 1. Mineral Substances.
Examples: Water; Common Salt; Ashes of
Plants and Animals.
Group 2. Non-nitrogenous force-producing
Substances, incapable of forming Flesh or Muscle.
Examples: Sago, Arrowroot
(Amylaceous); Sugar, Figs, Dates (Saccharine);
Animal and Vegetable Fats and Oils (Oleaginous).
Group 3. Nitrogenous Substances capable of producing
both Flesh and Muscle.
Examples: Eggs (Albuminous); Wheat,
Flesh (Fibrinous); Peas, Cheese (Caseinous).
Group 1. Containing Alcohol.
Examples: Beers, Wines; Spirits.
Group 2. Containing Volatile Oils.
Examples: Spices and Condiments, as Cloves,
Nutmegs, Pepper, Horse-radish, &c.
Group 3. Containing Acids.
Examples: Apples, Oranges, Rhubarb Stalks,
Vinegar.
Group 4. Containing Alkaloids, which act upon
the nervous system as stimulants or sedatives.
Examples: Tea, Coffee, Cocoa; Tobacco, Hemp,
Opium.
The first and most essential constituent of food is
water. Three fourths of the body is composed of water, and
it is by the agency of water that all kinds of food are taken up
into the system. Solid food contains large proportions of
water, but, in proportion to the dryness of food, water should be
added to it, in the form of some kind of beverage.
Quantities of Water in 100 Pounds of different kinds of solid food.
|
Vegetable
Food.
|
|
lbs.
|
|
lbs.
|
Cabbage
|
92
|
Maize
|
14
|
Turnips
|
87
|
Peas
|
14
|
Carrots
|
86
|
Beans
|
14
|
Beetroot
|
83
|
Lentils
|
14
|
Parsnips
|
79
|
Buckwheat
|
14
|
Potatoes
|
75
|
Oatmeal
|
13
|
Bread
|
44
|
Rye
|
13
|
Flour
|
14
|
Rice
|
13
|
Barley Meal
|
14
|
Cocoa
|
5
|
Animal
Food.
|
Milk
|
86
|
Lamb
|
50
|
Eggs
|
80
|
Mutton
|
44
|
Fish
|
78
|
Cheese
|
40
|
Veal
|
62
|
Pork
|
38
|
Beef
|
50
|
Bacon
|
30
|
An imperial gallon of water weighs 10 pounds
avoirdupois weight.
Water for dietetical purposes is obtained principally from
three sources:—1. Rivers; 2. Surface wells; 3. Deep or
Artesian wells. Water from all three sources contains
saline or mineral matters in solution, and, provided they are not
in quantities so large as to act injuriously on the system, water
may become a source of supply of these constituents to the
body. The best remedy for impure water is filtering, which
may be done by passing the water through charcoal and sand.
“A Poor Man’s Filter” is exhibited in the
Museum, which can be very easily and cheaply constructed by using
a common flower-pot, glazed inside, plugging the drainage hole
(not too tightly) with a piece of clean sponge, then adding
layers of animal charcoal, sand, and rather coarse gravel.
Filters from the establishments of the Messrs. Lipscombe, the
Messrs. Ransome, and the Carbon Filter Company are also
exhibited. The passing water over iron has been found to
have a remarkably purifying effect, and this has been patented by
Dr. Medlock.
The organic impurities of water are best tested by the
aid of the microscope, but, as an examination by this instrument
requires much time, a ready method of obtaining a knowledge of
the comparative organic impurity of waters is the addition of the
permanganate of soda or potash. This salt, which gives to
water a beautiful red colour, is easily decomposed by organic
matters. When the same quantity of the permanganate is
added to a series of waters containing organic matters, those
which contain the least retain the most colour and vice
versâ. Waters thus tested are exhibited in the
Collection.
Water
from the chalk or limestone is generally hard, arising from its
holding in solution carbonate of lime, which, although insoluble
in water, is dissolved by the agency of carbonic acid. By
Clark’s softening process the carbonic acid is neutralized
by lime, and the carbonate of lime is thus thrown down.
Specimens are exhibited.
Water is frequently stored in leaden cisterns, and when free
from carbonic and phosphoric acids it acts powerfully on
lead. Thus distilled water becomes speedily tainted with
lead, whilst Thames water and London surface well water act but
slightly upon it. Specimens of these waters acting upon
lead are exhibited in the Collection.
Common Salt is a chloride of sodium, and exerts an
extraordinary influence on animal as well as vegetable
life. All marine animals and plants seem to have their
existence determined by this substance. It enters into the
composition of the human body, and all over the world man uses
it, when he can obtain it, in its mineral form, as an addition to
his food.
In Case 5 will be seen a collection of salt from
various countries.
In Case 4 are examples of some of the principal Mineral
Substances, excepting water, in food. They are generally
essential to proper nutrition. In the body of a man,
weighing 154 lbs., there are about 8 lbs. of mineral
matter. Different parts of the body show peculiar affection
for particular ingredients to the exclusion of others. The
mineral salts contained in plants and animals are indestructible
by heat, hence they are called “ashes.”
It should be recollected, that in the boiling of food many of
the mineral substances are dissolved out of it, and where the
liquid that they are boiled in is not consumed such mineral
matters are thrown away. This is the case with boiled meat
and vegetables, and a constant use of such food may lead to
injurious effects. The best corrective to such a diet is
the use of uncooked fruit and vegetables. In this way the
eating of ripe fruits, as apples, pears, gooseberries, &c.,
and salads, has a beneficial effect on the system.
Although many things eaten as salads contain other
constituents of food besides mineral matters their beneficial
action in diet is due to the latter. The practice of eating
salads is not so common in Europe as before the introduction of
the potato, which, to a certain extent, supplies the same kind of
mineral matters to the blood. The practice of eating salads
is, nevertheless, to be highly commended; and many plants
formerly much used might now be consumed in this way with much
advantage. Plants thus used contain a larger quantity of
mineral matter than vegetables which have been boiled in
water. Various plants used as salads may be seen on the
shelves, and are renewed from time to time.
In Case 4 may be seen the varieties of substances
called “force-producers in food.”
The substance called Starch is found very abundantly in the
vegetable kingdom. Its presence was at one time regarded as
characteristic of plants, but it has recently been found in
animals. It occurs in the form of irregularly-shaped
granules, which vary in size from the 1/400 to the 1/2000-th of
an inch in diameter. These granules are simple or
compound. They vary in shape and size in every species of
plant, and are insoluble in water, but are easily diffused
through it. On being mixed with water, and exposed to a
temperature of 180°, the starch gelatinises, and, mixing with
the water, thickens it. This occurs in the cooking of
starch, and this property lies at the foundation of pudding
making.
Starch is abundantly present in all the more common forms of
vegetable diet. Is exists in a state of almost absolute
purity in the substances known as arrowroot, tapioca, and
sago. These substances from whatever source obtained,
contain little or no nutritious or flesh-forming food, and,
consequently, ought never to become the substantive diet of human
beings. Many plants contain so large quantities of starch,
and so small quantities of flesh-forming matter, that they ought
only to be taken on account of their starch. Such are the
potato and rice, in which the quantity of starch to flesh-forming
matter is as 14 to 1, whilst in wheat it is only as 5 to 1.
Potatoes and rice, therefore, can never form the staple article
of the diet of the people of this country, who need a large
quantity of force-producing matter in order to enable them to
perform their work.
Starch is extensively used in the arts manufactures, and for
domestic purposes. It is prepared for this purpose from the
potato, wheat, rice, flour, and the coarser kinds of sago.
In Cases 6 and 16 is an extensive series of
starches, sago, arrowroot, tapioca, &c. &c., from various
parts of the world.
The
following table gives the quantities of Starch in 100 parts of
various kinds of food:—
Rice
|
74
|
Beans
|
36
|
Maize
|
60
|
Lentils
|
35
|
Wheat
|
59
|
Parsnips
|
17
|
Rye
|
51
|
Potatoes
|
15
|
Buckwheat
|
50
|
Mangel Wurzel
|
12
|
Bread
|
48
|
Carrots
|
11
|
Barley
|
48
|
Turnips
|
10
|
Oats
|
39
|
Cabbage
|
4
|
Peas
|
37
|
|
|
Sea-weeds contain lichen starch, and are frequently used as
food. Specimens may be seen in Case 7. In
China the people are very fond of sea-weeds, and many kinds are
collected and added to soups, or eaten alone with sauce. In
times of scarcity the poorer inhabitants of the sea-shores of
Europe have recourse to sea-weeds for a supply of food.
Although this plant contains but a small quantity of flesh and
force-producing matter, it yields an abundance of starch and
mineral matters in a condition which acts very beneficially on
the human system, and its introduction into Europe has been of
the greatest benefit to its teeming populations.
The potato is an herbaceous plant producing annual stems from
an underground tuber or root-stock which is the part that is used
as an article of food. It has white flowers and a green
fruit, which, like all the plants of the order to which it
belongs, contain a poisonous principle. The native country
of the plant is South America. It has been found wild in
various parts of Chili, and also near Monte Video, Lima, Quito,
Santa Fe de Bogota, and in Mexico. Spain was the country in
which this plant was first cultivated in Europe; from thence it
extended into Italy. It was first grown in the British
Islands by Sir Walter Raleigh in his garden at Youghal in
Ireland, but it was not generally cultivated in Great Britain
till the middle the last century. The only part of the
plant employed as food is the tuber, which is a kind of
underground stem. Upon this stem buds are formed which are
called “eyes,” and from these, by cutting up the
potato, the plant is propagated. The tubers of the wild
potato are small in size, but by culture they may be very much
enlarged. In this country many varieties of the potato are
known under the names of “kidneys,”
“rounds,” “reds,” “blues,”
“whites,” &c. Many of these varieties are
now disappearing, the “white,” “kidney,”
and “round” potatoes being preferred to all
others. The potato contains large quantities of water (75
per cent.), and less flesh and force-producing matters than any
other plant cultivated for human food. It is therefore not
adapted for consumption as a principal article of diet, and
should only be employed as an addition to more nutritious kinds
of food. It contains a variety of mineral matters, which
also render it valuable as an article of diet. It has for
many years been liable, in Europe, to a diseased condition, in
which the water seems to be increased, and decomposition
consequently readily sets in. The decayed parts are
infested by a fungus, but this has not been shown to have
anything to do with the production of the disease. Potatoes
are largely employed in this country for the production of
starch, which is used for a variety of purposes in the arts and
manufactures. Potatoes are cooked in many ways, and all the
varieties of food which can be obtained from the flour of the
cerealia may be procured from the potato, as starch, macaroni,
vermicelli, &c.
The analysis of the Potato may be seen in Case 8, as
well as various preparations from it.
This plant belongs to the natural order of grasses. It
is a native of East India, and is extensively cultivated
throughout Asia, in North and South Carolina, and other parts of
the world. Although more largely consumed by the
inhabitants of the world than any other grain, it contains less
flesh and force-producing matter.
When employed in this country it should only be used as an
adjunct to other kinds of food more rich in
force-producers. Boiled, as an addition to meat, or in the
form of pudding or curry, it may be judiciously employed, as a
variety, especially in the food of the young.
Case 9 shows the analysis of rice, and many samples of
the grain are exhibited in the Collection.
Sugar has a chemical composition very nearly resembling
starch, but it differs in both chemical and physical
properties. Sugar is soluble in water, whilst starch is
only diffusible through it. Sugar undergoes the process of
fermentation, which starch does not. Sugar has a sweet
taste, while starch is almost tasteless. Starch is,
however, convertible into sugar by the agency of nitrogenous
substances. If starch is placed in contact with saliva a
little time it becomes soluble, and gives the reactions of sugar;
and it is probable that in this way starch itself becomes
absorbed into the blood. Sugar, like starch, assumes various forms,
and three of these are found in common articles of diet.
These are cane sugar, grape sugar, and milk sugar.
The action of sugar on the system is identical with
starch. As it is more readily absorbed into the blood than
starch, it is better adapted as a force-producer for the
young. Hence it is found supplied to the young in all the
mammalia, in the milk secreted by their mothers. That it is
adapted for the young is shown by the instinctive propensity
children display to partake of this form of diet. Although
adapted for children, the facility with which it decomposes
renders it frequently injurious to adults.
Most plants contain sugar in their roots. But in some
large quantities are deposited, as in the sugar beet, which is
employed most extensively in France and on the continent of
Europe for the supply of sugar for dietetical purposes. A
series of specimens illustrating products from beet-root,
including sugar, from Messieurs Serret, Hamoir, and Co., of
Valenciennes, are exhibited in the Collection.
Sugar is the basis of all kinds of confectionery, specimens of
which are exhibited by Messrs. Fortnum and Mason, of Piccadilly,
in Case 111.
Samples of sugar are exhibited in Cases 17, 110,
112, and 113, some of which have obtained been from
other plants than the sugar cane.
Fruits after being saturated with sugar are also preserved and
kept dry. In Case 15 preserved fruits of various
kinds are exhibited by Messrs. Fortnum and Mason. It is in
this way that fruits are brought to this country which otherwise
would not be seen on account of their perishing nature.
Treacle or Molasses is the uncrystallized
portion of sugar which is separated by draining from the brown
sugar.
Grape Sugar or Glucose is found in the fruits of
plants, and is especially abundant in the grape. Grapes,
when dried, are eaten on account of the glucose they
contain. They are known in the shops under the name of
“plums,” “raisins,” and
“currants.” The latter word is a corruption of
Corinth, the small grape yielding this, being cultivated in the
vicinity of Corinth, on the classic soil of Greece.
Dried fruits of the grape-vine, presented by Messrs. Fortnum
and Mason, Piccadilly, are exhibited in Case 14.
Honey, which is the stored food of the bee, contains
both crystallizable and uncrystallizable grape sugar. The
crystals of the former may be easily detected by the aid of a low
power of the microscope. Samples of British honey, and
honey from France, Russia, and other countries, may be seen in
Cases 18.
Substances resembling Sugar, such as dextrin, gum,
liquorice, manna, &c., are exhibited in Case
107. Among plants yielding sugar may be noted the
Chinese sugar millet (Case 17), sweet potato (Case
8), turnips (Case 11), carrots (Case 11),
and Jerusalem artichoke (Case 12), the analyses of which
are exhibited.
Under the names of oil, butter, fat, lard, suet, and grease, a
substance is used largely as an article of food, which differs
from starch and sugar in the absence of oxygen gas. The
composition of these oleaginous substances may be represented as
follows:—Carbon 11 parts; hydrogen 10 parts; oxygen 1
part.
Oil differs from the other carbonaceous substances in food in
not only supplying materials for maintaining animal heat, but in
forming a part of the tissues of the body called fat. The
quantity consumed in animal food is very large, constituting
frequently more than half of the bulk of the food consumed.
It is also found very generally present in the vegetable
substances used as food. Although essential as an article
of diet in certain quantities, oil is less digestible than other
kinds of food, and those foods which contain it in large
quantities are generally indigestible. The principal source
of oil used as food from the vegetable kingdom is the
Olive. This plant is cultivated in the south of
Europe. The part of the plant which contains the oil is the
fruit. The seeds of most plants contain oil in addition to
starch and other principles. Many seeds are used for
obtaining oil for various purposes in the arts, as the poppy,
rape, mustard, hemp, and flax seeds. In Case 20 is a
collection of nuts and seeds containing oil commonly eaten as
food. Case 21 contains the analysis of the coco-nut;
and in the same Case that of an African bread called “Dika
bread,” both of which illustrate food products containing
an abundance of oil. The cocoa, or chocolate plant, is one
of the most remarkable vegetable productions yielding oil, the
seeds giving nearly 50 per cent. of a hard oil, or butter.
See Case 53.
In Case 4 are shown those ingredients of food, which
are capable of forming muscle or flesh. They are made use
of in the human body partly for the construction of muscle, and
partly for the production of mechanical force and heat.
They are all nearly identical in their chemical composition.
1. Albumen, made from Eggs
and from Blood. It forms about 7 parts in 100 of blood, and is
always present in lymph and chyle. Liquid or soluble
albumen, as shown in the white of egg, coagulates by heat and
various chemical agents.
2. Albumen, as found in the
juices of carrots, turnips, and cabbages, and obtained by boiling
their juices. It is the same body as albumen from eggs.
3. Fibrin made by stirring
blood with a rod. It is the basis of muscle or flesh.
Flesh-fibrin probably bears the same relation to blood-fibrin as
coagulated albumen does to soluble albumen.
4. Fibrin made from
Wheat-flour. It is identical with the fibrin found in
flesh, but not exactly the same as that found in blood, and is
known as Gluten.
5. Casein prepared from milk,
in which it is soluble, owing probably to a little alkali: when
an acid is added, the Casein curdles or coagulates, and then is
known as Cheese. In 100 parts of cows’ milk there are
3½ parts of Casein.
6. Casein or Legumin as found in peas, beans, lentils,
coffee, &c. The Casein of Vegetables is now supposed by
most chemists to be identical with the Casein or Cheese of Milk,
but a few chemists still deny this. 100 parts of peas
contain above 20 parts of Casein.
Eggs are very nutritious articles of food. They contain
as much oil or fat and flesh and force-producing matter as
butcher’s meat. The white is not, however, so
digestible as the flesh of meat. They enter into the
composition of puddings, cakes, buns, and other forms of
diet. They are also eaten alone, boiled or fried, and are
most digestible when least done.
The egg of the domestic fowl is usually eaten, but those of
other birds are frequently employed as food. The eggs of
the woodcock, plover, and other small birds, are esteemed a
luxury. Those of the duck and goose have a strong flavour,
and those of sea-fowl are fishy. The eggs of the turkey are
rich in flavour, whilst those of the guinea-hen have a very
delicate flavour. All birds’ eggs may be eaten with
impunity. The eggs of the crocodile, and other oviparous
reptiles, are eaten in some parts of the world.
In Case 61 is a collection of the Eggs of domestic
poultry and some other birds, together with the analysis of
Hen’s Eggs.
The Flesh and Force-producers are most abundant in those
plants which yield the substantive food of man. These
plants belong principally to the group of cereal grasses, as
wheat, oats, barley, &c., and leguminous plants, as peas,
beans, lentils, &c. Of these the most important is
wheat. At the western end of the gallery are shown samples
of many cultivated varieties of wheat, oats, barley, rye, and
maize, in the straw, and in grain.
The Flesh and Force-producers exist also in large quantities
in milk, and in the flesh of vertebrate animals, divided into
mammals, birds, fishes, and reptiles.
The wheat plant is grown all over the world, but flourishes
mostly between the parallels of 25 and 60 degrees of
latitude. It is more abundant in the northern than in the
southern hemisphere.
The varieties of wheat cultivated in Europe may be divided
into those whose flowers produce awns, and those without these
appendages, or bearded and beardless wheats.
The fruits or seeds of these varieties are red or white, hence a
further subdivision takes place into red or white,
bearded or beardless, wheats. Amongst the red bearded
varieties is the fingered Egyptian or Mummy Wheat, which presents
the peculiarity of several branches bearing fruits proceeding
from its central stalk. Wheat is also called hard and soft
according to its consistence, and winter and spring as it is sown
at those seasons of the year. The red varieties yield the
largest amount of grain, but the white the whitest flour.
Wheat is preferred to the other cereal grasses as an article
of food on account of its containing a larger quantity of
flesh-forming matters. The flour also may be rendered very
white by separating it from the husks, or bran, and the fruit is
much more easily separated from the chaff than is the case with
the other cereals. The proportion of flesh and
force-producing to those of force-producers only, is more nearly
adjusted to the requirements of the system in wheat than in any
other food. Hence, probably, its very general use as an
article of food amongst the populations of the hardest working
nations in the world.
In Case 26 is an analysis of the various constituents
found in a pound of wheaten flour.
The chemical analysis of barley, buckwheat, maize, millet,
oats, rye, and rice may be inspected in the respective cases.
The most common as well as the most important form in which
wheaten flour is consumed as food is bread. In Case
25, which may be called the “Bread Case,” the
constituent ingredients, with their respective quantities used in
making bread, are exhibited. There are three methods of
making bread, the ordinary or fermented process, the unfermented process,
and that employed in making aërated bread. Bread is
either vesiculated or unvesiculated, the latter is
called unleavened bread, and consists of bread, and of such
preparations of flour as are known by the names of biscuits,
cakes, &c. of which two cases of samples are shown by Messrs.
Peek, Frean, and Co. of London, and J. W. Mackie and Sons of
Edinburgh. For other details concerning bread the visitor
is referred to the printed labels in the case.
According to the classification of the Food Collection, Flesh
is placed next to Wheat and other cereals in Group 3, which
includes nitrogenous substances capable of producing both
flesh and force.
Animal food is composed of the same materials as vegetable
food. It is formed of the same elements, and presents the
same proximate principles. It contains water and mineral
matters of the same kind as plants. Its force-producing
substances appear in the form of fat, and its flesh and
force-producing substances in the form of fibrin and albumen.
Of all animal foods milk is the most important, as it may be
regarded as the type of human food. Case 55 contains
an analysis of cow’s milk, human milk, and asses milk, and
is accompanied with explanatory labels.
Milk is preserved in various ways, so that it may be taken on
long voyages or otherwise employed as a diet where living animals
cannot be kept to produce it. It is preserved both in a
liquid and solid state. The latter mode of preparation
appears to have the advantage.
Butter is formed from cream by the process of
“churning.” The casein is held in solution in
the milk by the aid of certain salts; when these are removed by
acids the casein coagulates, and forms “curds.”
When the curd is removed with the butter and pressed it forms
cheese. The best and highest-priced cheeses are those in
which there is most butter. The casein without the butter
is hard and indigestible.
At the western end of the gallery over the upright cases
containing wheat, barley, oats, maize, &c., are arranged some
selected heads of oxen in illustration of the principal breeds in
this country.
The Case, 56, is specially devoted to the composition
of one pound of beef, mutton, pork, veal, lamb, and fowl.
Wax models represent the substances, and each analysis is
accompanied with descriptive printed labels.
In Case 70 are seen mounted specimens of the varieties
of hares and rabbits indigenous to the United Kingdom.
The flesh of birds, fish, and reptiles is also represented in
the Collection.
Cases 63 and 64 contain mounted examples of the
varieties of pheasant successfully introduced into Great Britain,
and a series of grouse, ptarmigan, capercailzie, &c., as
representing the game birds of that family.
Fish is represented in the
Collection by mounted specimens of the commoner kinds of fish
brought to market, and by the analysis of a pound of salmon,
mackerel, sole, conger eel, herring, and pike.
Fish yield a larger number of
species used as food by man than either birds or
quadrupeds. There are but few fishes caught in the fresh
waters and seas of Great Britain that may not be eaten with
impunity. In some countries the only animal food known is
fish. The flesh of fish contains less oil or fat, and a
larger quantity of mineral matters than the flesh of birds or
mammals. The digestibility of fish is not so great as that
of butcher’s meat; hence, generally, it is not so
nutritious as the flesh of birds or quadrupeds. Fish is
undoubtedly a valuable as well as an agreeable article of diet,
and should, where possible, be introduced into all dietaries.
In connexion with fish the collection illustrating Economic
Fish Culture, mainly belonging to, and superintended by, Mr.
Frank Buckland, Her Majesty’s Inspector of Salmon
Fisheries, should not be left unmentioned, although not forming a
part of the Food Collection in the Branch Museum at Bethnal
Green. This collection illustrates the science of breeding
salmon, trout, and other fish by artificial means. It also
includes a large number of casts of different kinds of fish, and
a series of nets and other apparatus used in the legal and
illegal capture of fish. At present it is exhibited in the
arcades on the western side of the Royal Horticultural Gardens at
South Kensington. During the period of the International
Exhibition it is not accessible except to visitors to the
Exhibition; but when the Exhibition is not going on, visitors can
see the Museum of Economic Fish Culture under the rules and
regulations which govern the South Kensington Museum, with which
it is officially connected as an addition to the Food
Collection.
Lobsters, crabs, prawns, and shrimps, are exhibited in the
collection in illustration of the edible animals belonging to the
crustacea; and of molluscous animals, embracing the shell fish of
the rivers and oceans, examples of the oyster, scallop, whelk,
periwinkle, common snail, and Roman snail, are shown. (See
Cases 59 and 60.)
Of reptiles, but few are eaten in this country as food.
Their flesh is, however, white and delicate, and rich in gelatin
and fat. No accurate analysis seems to have been published
of the flesh of these animals. The flesh of the green
turtle is consumed in considerable quantity, and of it the famous
turtle soup is made. The common and edible frog are eaten
on the continent; and the land tortoise, common on the coast of
the Mediterranean, is eaten by the inhabitants of Italy and the
Levant. The flesh of the crocodile, alligator, and iguana,
is also consumed in the countries where such creatures
abound.
These substances are next in the order of classification by
reason of the large quantity of a flesh and force-producing
substance contained in them called casein. The
casein of vegetables is now supposed by most chemists to be
identical with the casein or cheese of milk. The
constituents or ingredients in one pound of peas, and in one
pound of beans, are shown in Cases 30 and 31.
The visitor may examine a collection of beans from various
foreign countries arranged in the Cases at the western end of the
Collection.
Lentils are shown in Case 30. By examining the
analysis of this extremely nutritious product, the large
proportion of casein is at once perceived.
The Food Substances in this Class are divided into four
groups, namely:—Those containing alcohol, those containing
volatile oils, those containing acids, and those containing
alkaloids, which act upon the nervous system as stimulants or
sedatives.
The most common form in which alcohol is employed in this
country is that of beer. Beer is distinguished from other
alcoholic beverages by the addition of hops, which are the female
catkins of a plant extensively grown in this country. Case
35 contains the materials from which porter is brewed, and
illustrates the changes which malt undergoes during its
conversion into beer. The analysis of stout, porter, pale
ale, mild ale, and strong ale are exhibited in Case 35,
and the quantities of water, alcohol, sugar, and acetic acid are
shown in an imperial pint of each. Next to beer the
beverages containing alcohol consumed in this country are
wines. The visitor is referred to the printed descriptive
labels for details concerning the sources and manufacture of
various wines from the juice of fruits, especially grapes.
In Case 36 the quantities of water, alcohol, sugar, and
tartaric acid, are shown in an imperial pint of the following
wines:—Port, Brown Sherry, Pale Sherry, Claret, Burgundy,
Hock, Moselle, Champagne, and Madeira.
In this country wines are made from oranges, raisins,
gooseberries, currants, elderberries, and other fruits.
They are usually called “home-made” or
“British” wines. They contain other acids
besides tartaric, hence the necessity of adding to them large
quantities of sugar to cover the taste of the acid. Samples
of British wines are exhibited in the Collection.
The terms “distilled” and “ardent”
spirits are applied to alcoholic beverages which contain a very
large per-centage of alcohol.
Those most commonly used are Gin, Rum, Whisky, and Brandy.
Alcoholic drinks when taken into the stomach act injuriously
upon the mucous membrane, and when absorbed into the blood excite
the nervous system. When taken in too large quantities, or
upon an empty stomach, they lay the foundation of diseases of the
stomach and surrounding organs, which often terminate in
death. Their action on the nervous system, though pleasant
and agreeable, and even healthful in small quantities, becomes a
source of fearful disease when carried to excess.
It is difficult to procure alcohol pure, and distilled spirits
always contain a certain quantity of water. A spirit having
a density of .920 is called “proof spirit” in this
country; and when distilled spirits contain more or less alcohol
than this, they are said to be “under” or
“above” proof.
The quantities of alcohol, water, and sugar in an imperial
pint of Brandy, Rum, and Gin, are shown in the Case
39.
The physical degeneracy and moral degradation attendant upon
taking alcohol in excess are well known; and no language is too
strong to condemn the folly and wickedness of those who thus
convert one of the blessings of Providence into a curse.
In Cases 38 the visitor will see samples of alcohol
obtained from various sources; also a variety of flavored
spirits, or “liqueurs,” from various countries, and a
Japanese spirit or liqueur, distilled from rice, called
“soke,” or “saki.”
There is a large class of substances which are added to food
for the purpose of giving it flavour, and which on account of the
volatile oils they contain act as stimulants. These
substances are known as Spices and Condiments. They also
serve as the basis of a large number of sauces, which are sold
ready prepared for the purpose of being added to cooked
food. There is some difficulty in separating Spices from
Condiments, but the former are more generally eaten with sugar,
the latter with salt.
In Cases 40 to 43 will be found an extensive
series of Spices and Condiments from various parts of the
world.
There is another class of substances, which cannot be called
either condiments or spices, but which are extensively employed
to render the taste of food more agreeable. Among these may
be noticed (see Case 44) oil of bitter almonds, vanilla,
lemon, orange, and citron peel.
One of the most interesting discoveries of modern chemistry is
the nature of those essences which give the various flavours to
fruits. These “artificial fruit essences” have
been so skilfully imitated in the laboratory of the chemist that
they are extensively employed to flavour confectionery,
&c. Examples of these artificially prepared fruit
essences, may be seen in the case.
Many of the organic acids resemble closely in their
composition starch and sugar, and may to a certain extent act on
the system in the same way. In the classification adopted
in the Food Collection, they are classed under medicinal or
auxiliary food.
Acetic Acid or Vinegar is obtained either from the
oxidation of alcohol in fermented liquors, or from the
distillation of wood. Common vinegar is obtained from the
oxidation of the fermented wort of malt. A series of
preparations illustrating the processes undergone in the
formation of vinegar from malt has been presented to the
collection by Messrs. Beaufoy and Co.
Citric Acid is contained in many fruits, but exists in
greatest abundance and purity in the fruits of the orange, the
lemon, the citron, the shaddock, the pommeloe, the lime, and
others. All these fruits contain citric acid, and varying
proportions of sugar. Citric acid can be separated from the
juice of these plants in a crystalline form.
Tartaric Acid is found in the juice of the fruits of
the vine tribe, more especially of the common vine. This
acid gives the acidity to the fruit of the grape, and is the acid
present in wines.
Malic Acid is contained in the fruits of the natural
order Rosaceæ. It has the same general properties as
the other acids, and is contained alone in apples and pears;
whilst in cherries, plums, &c. it is mixed with other
acids.
Oxalic Acid is contained in the wood sorrel, also in
the common sorrel, and various species of rhubarb. Species
of the latter genus are extensively cultivated in this country,
and the stalks of their large leaves cut up and made into pies,
puddings, &c. They are ready for use early in the
spring, and are an excellent substitute for fruit in pies and
tarts at that season of the year. Although oxalic acid is a
poison when taken in considerable quantities, as
ordinarily consumed it probably acts in the same way on the
system as other acids.
For examples of Acids, Pickles of various kinds, &c., see
Case 23.
The next and last group is that of Food Substances containing
alkaloids, which act upon the nervous system as stimulants or
sedatives. The principal examples are Tea, Coffee, Cocoa,
Tobacco, Hemp, and Opium.
Tea and Coffee have hardly any other properties in common than
the possession of an alkaloid called Theine or
Caffeine, which is identical in the two. Chocolate
contains a peculiar alkaloid called Theobromine.
Paraguay tea or “maté” is the only other
substance extensively used as a dietetic infusion that contains
theine; in South America it occupies the same position in
domestic economy as Chinese tea does in this country. Case
46 exhibits the chemical analysis of a pound of ordinary
good Chinese Tea; and in Cases 47, 48, and
99, contiguously placed, are numerous samples of tea from
China, Japan, Java, Brazil, and East India.
The analysis of a pound of Coffee is shown in Case 50;
and many samples of raw coffee from various parts of the world
are exhibited. The visitor’s notice is directed to
the printed descriptive label concerning Coffee, which is
suspended near the case containing the analysis.
Cocoa is represented by the analysis of a pound of
Cocoa paste in Case 53, and by a series of the fruit pods
containing the seed or nuts, presented by Messrs. Fry and Son, of
Bristol, as well as by various preparations and
confections. The distinguishing feature of its composition
consists in the large quantities of fat and albumen which it
contains; so that Cocoa not only acts as an alternative through
its theobromine, but as a force-producing and flesh and
force-producing food. Samples of the commercial varieties
of the nuts or seeds from various countries are exhibited.
A variety of substances are exhibited in Case 49 in
illustration of the use of the leaves of various plants for
making potable infusions. The most important is Paraguay
tea or “maté,” which contains the same
alkaloid called theine, as the Chinese tea plant. A
quantity of “maté” is shown, with calabash or
dried gourd for making the infusion, and sucking pipe for
drinking it. A large number of substances have been
employed from time to time as substitutes for Coffee, and
prepared in the same way. Many of them are shown in Case
52. In this country none of these so-called Coffee
Substitutes have established themselves in public reputation, and
are seldom sold. Some of them, however, are used as
adulterants of Coffee.
Although Tobacco has been only comparatively recently
introduced amongst the inhabitants of the Old World, it is more
extensively employed than any other narcotic. It is the
produce of various species of the genus Nicotiana.
The practice of smoking the leaves of these plants was introduced
from the New World. The species, which is a native of
America, and which supplies the greater proportion of the Tobacco
smoked in Europe, is the Nicotiana Tabacum. The
leaves of these plants contain an active and highly poisonous
principle called Nicotine, which is the agent that
produces the narcotic effect experienced in smoking. This
narcotic effect resembles in some measure that of alcohol.
Tobacco has, however, a less stimulant effect than alcohol, and
produces, especially at first, a greater derangement of the
general nervous system.
The chemical analysis of one pound of Tobacco is exhibited in
Case 98. Cases 93 to 97 contain a
series of specimens of the leaves of species and varieties of
Tobacco cultivated in various parts of the world, with samples
also of the Cigars and Tobaccos manufactured from them.
Examples of varieties of Snuffs used in this and other
countries will be seen in Case 97. Snuffs are
usually made from the stalks and ribs of tobacco leaves.
Tobacco is liable to be adulterated with the leaves of other
plants; these, however, can be detected under the
microscope. Specimens of Tobacco adulterated with other
leaves are illustrated in the diagram near the cases.
Opium is used extensively as a medicine, on account of its
power of alleviating pain and inducing sleep. It is a very
powerful, and consequently dangerous narcotic poison, and should
never be taken except under medical advice. In small doses
it acts as a stimulant. On account of this latter property
and its subsequent soothing influence, it has been indulged in by
man, and is consumed largely in China and other parts of the
world as a dietetical luxury. When taken for this purpose
it is smoked, and is generally consumed with tobacco or some
other leaf in a pipe. Pipes used for this purpose in China
are exhibited in the cases containing Chinese food, with a
collection of Chinese tobaccos, most of which appear to contain
Opium.
The practice of “opium eating,” as it is called,
exerts a most prejudicial effect upon the system; and although
not rapidly destroying life, the victim of this habit is after a
time rendered perfectly miserable if not able to procure this
indulgence. As is the case with alcohol and tobacco, the
system becomes accustomed to the use of this narcotic, and
prodigious quantities have been consumed by those who have
addicted themselves to the practice of taking it for the sake of
its effect on the system.
A series of preparations from Opium, presented by the Society
of Apothecaries, Apothecaries Hall, and specimens of other
narcotic agents are exhibited in Case 92. The fruits
of narcotic plants are sometimes consumed in this country in
mistake for other plants, producing fatal effects. Examples
of some of these poisonous plants are exhibited in the
Collection, as well as diagrams of others.
Before closing this necessarily brief Guide to the Food
Collection, it may be as well to notice some illustrations which
may be deemed exceptional to the Classification.
Fungi.—The group of Fungi contains a number of
plants which are eaten as food, whilst many of them act as
virulent poisons. Those which are edible contain varying
quantities of starch, sugar, woody fibre, and albumen, together
with an acid called fungic acid. A large number of
species are eaten on the continent of Europe, which are not used
in this country at all. Models of the common Mushroom, the
Morel, and the Truffle, are shown, as well as preserved
specimens.
The visitor should notice the large Truffle from Australia
called “Native Bread.” It is in Case
34.
A series of coloured diagrams or drawings of British Fungi
taken from living specimens, both edible and poisonous, are also
exhibited, having been purchased from the artist, H. Worthington
Smith, Esq., F.L.S.
National Foods.—Various food products of
foreign nations are included in the Collection, and for the sake
of illustrating National Food have been kept
separate. It is hoped that other collections of the same
kind, illustrating national peculiarities of diet may be
formed and presented to the Museum.
In Cases 72 to 78 is an important collection of
Chinese Food, which was received in 1859. The collection
was procured from two districts, Shanghae and Foo-Chow-Foo, and
contains many curious and interesting edible substances and
preparations, some of them new to this country. Descriptive
labels are attached to every specimen.
Japanese, Siamese, and East Indian food products are shown in
Cases 81 to 86.
In Case 79 will be noticed a series of edible
birds’ nests from China, Siam, Java, Borneo, and other
countries. These nests are formed by swallows, two specimen
of which are shown in the case.
This Collection, formed and arranged for the Department of
Science and Art by Andrew Murray, Esq., F.L.S., is exhibited at
the eastern end of the gallery, partly on the wall, and partly in
glazed cases on the counter. It is intended to illustrate
the ravages of such insects as are known to be destructive to
alimentary substances, or that are noxious or injurious to man
and domestic animals. Also, those insects known to be
destructive to timber, or otherwise exemplifying the science of
Entomology in its relation to Forestry. The Collection is
contained in 42 cases, to which belong 31 framed
diagrams and drawings. This Entomological Collection is yet
incomplete, and may be considered as still in course of
formation.
The extensive employment of various substances for the
Adulteration of Food has led to the formation of a collection of
those more commonly employed. In Cases 97 and
98 these substances are arranged according as they have
been obtained from the animal, vegetable, or mineral
kingdom. They have been selected principally from the
results obtained by Dr. Hassall, and made known in his work
“On the Adulteration of Food.”
The adulteration of Milk with Water is shown in
Case 54. These examples are renewed weekly; and the
use of the lactometer or milk measurer, is also
exemplified in the same case. The goodness of milk can also
be ascertained by means of the microscope. The diagrams on
the wall represent good cream, good pure milk, bad milk, and the
curd of milk as seen under the microscope.
LONDON:
Printed by George E. Eyre and William Spottiswoode,
Printers to the Queen’s most Excellent Majesty.
For Her Majesty’s Stationery Office.
[4018.—5000.—7/72.]