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The earth used in their construction is the subsoil, brought up from a considerable depth, as the ant-hills are yellow, while the surface soil is black. The earth is first swallowed by the insect and thus it becomes mixed with some albuminous matter which converts it into a cement that resists the action of rain.
It was Louis Pasteur who brought bacteria to the front, and it was by his labours that these organisms were rescued from the obscurity of scientific publications and made objects of general and crowning interest. It was Pasteur who first successfully combated the chemical theory of fermentation by showing that albuminous matter had no inherent tendency to decomposition.
Serve hot. A few random remarks about the preparation of albuminous foods. If the albumen in food is hardened by prolonged cooking, it is rendered less instead of more digestible. Therefore, the so-called well-cooked meats are really badly-cooked meats. Meats should be only half done, or rare. To do this properly, it is necessary to cook with a quick fire. Steaks should be broiled, not fried.
Advancing to more general considerations, we may regard, with M. Gay-Lussac, the caoutchouc as the oily part the butter of vegetable milk. We find in the milk of plants caseum and caoutchouc; in the milk of animals, caseum and butter. The proportions of the two albuminous and oily principles differ in the various species of animals and of lactescent plants.
The albuminous, or gelatinous principle of plants is mainly useful in forming muscle; while the ashes of plants, the unconsumable parts, are for the supply, mainly, of bone, hair, and horn, but also of muscle and of blood, and to supply the waste which continually goes on. Now, there are several qualities which are essentially characteristic of a disposition to fatten.
In cases of considerable increase of tension, particularly if the onset is sudden, the circulation of lymph in the cornea is interfered with, the anterior layers of the cornea become edematous, the spaces between the lamellae filled with albuminous fluid.
The lime used neutralises acids in the contaminated and impure water, precipitates colouring matters, mordants, soap, albuminous matters, etc. Tests of Purity. I will now describe a few tests that may be of value to you in deciding as to what substances are contaminating any impure waters that may be at hand. Iron.
The addition of a small quantity of a food, rich in oil and albuminous substances, to the ordinary kinds of feed, which contain a large quantity of vegetable fibre or woody matter, more or less indigestible, but, nevertheless, indispensable to the herbivorous animals, their digestive organs being adapted to a bulky food, has been found highly advantageous in practice.
All knowledge is interesting to a wise man, and the knowledge of nature is interesting to all men. It is very interesting to know, that, from the albuminous white of the egg, the chick in the egg gets the materials for its flesh, bones, blood, and feathers; while, from the fatty yolk of the egg, it gets the heat and energy which enable it at length to break its shell and begin the world.
They are built up from the elements by plants, and are called organic. Human beings and the lower animals take the organized materials they require, and build them up in their own bodies into still more highly organized forms. The organic compounds found in the body are usually divided into three great classes: 1. Proteids, or albuminous substances. 2. Fats.
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