Some people have an idea that skimmed milk, if given in sufficient quantity, is good enough for the weaning period of calf-feeding; but this is a very serious mistake, for the cream, of which it has been deprived, contained nearly all the oleaginous principles, and the azote or nitrogen, on which the vivifying properties of that fluid depends.

A little bit of cowdung (nitrogen) and some hay (carbon) should be spread on it, and the contents of the pit left for 20-30 days.

The chief of these solid matters is urea, a complex product made up of four elements,carbon, hydrogen, oxygen, and nitrogen.

As the name implies, the proteids, or nitrogenous foods, contain nitrogen; carbohydrates and fats, on the contrary, do not contain nitrogen.

As the name implies, the proteids, or nitrogenous foods, contain nitrogen; carbohydrates and fats, on the contrary, do not contain nitrogen.

They contain no nitrogen, but the three elements, carbon, hydrogen, and oxygen, the last two in the same proportion as in water.

They are alike in chemical composition, consisting of carbon and hydrogen, with a little oxygen and no nitrogen.

Corn meal is not only rich in nitrogen, but the proportion of fat is also large; hence it is a most important and nutritious article of food.

A, represents the alimentary canal; L, the pulmonary surface; K, the surface of the renal epithelium; S, the skin; o, oxygen; h, hydrogen,; n, nitrogen. ] 233.

Urea, the most important and most abundant constituent of urine, contains the four elements, but nitrogen forms one-half its weight.

While, therefore, the lungs expel carbon dioxid chiefly, the kidneys expel nitrogen.

But what he perhaps appreciated the most was the inspiration he received from the great teacher Davy, who was then Professor of Chemistry and Director of the Laboratory of the Royal Institution; for Faraday assisted at Davy's lectures, and in an humble way even aided his investigations, sharing the dangers arising from the explosion of the unstable substance, chloride of nitrogen, that Davy was then investigating.

It has been known since the time of Cavendish, in 1785, that small quantities of nitric acid could be formed directly from the nitrogen and oxygen of the atmosphere by the passage of electric sparks; but heretofore, the quantity so found has been too small to be of any commercial value.

Quite recently, however, one of the electro-chemical companies at Niagara Falls has succeeded in commercially solving the important problem of the fixation of the nitrogen of the atmosphere; it being claimed that the cost of thus producing one ton of commercial nitric acid, of a market value of over eighty dollars, does not greatly exceed twenty dollars.

What is wanted is to know how the atoms of carbon, hydrogen, oxygen, and nitrogen are linked together, for, strange to say, these differences of groupings, which may be found to exist between these three or four elements, endow the compounds with radically different properties and serve us as a basis of classification.

The alkaloids, that most important class from a medical and pharmaceutical point of view, have until quite recently been defined in the books simply as "vegetable bases, containing nitrogen."

Whether they were marsh-gas or benzol derivatives was not made out; how the four elements, carbon, hydrogen, oxygen, and nitrogen, were grouped together in them was absolutely a thing unknown.

The more or less strongly marked basic character of these bodies, the presence of nitrogen as an essential element, and, above all, the analogy shown to ammonia in the way these bases united with acids to form salts, not by replacement of the hydrogen of the acid, but by direct addition of acid and base, pointed unmistakably to this constitution.

that existing between benzol, C{6}H{6}, and naphthalene, C{10}H{8}; and the theory generally accepted by those chemists who have been occupying themselves with these bases and their derivatives is that pyridine is simply benzol, in which an atom of nitrogen replaces the triad group, CH, and quinoline, the naphthalene molecule with a similar change.

it decomposes into bromoform, carbon dioxide, nitrogen, and pyridine.

One fact, at any rate, is out of reach of such refinements, and this is, that all the forms of protoplasm which have yet been examined contain the four elements, carbon, hydrogen, oxygen, and nitrogen, in very complex union, and that they behave similarly towards several reagents.

A plant supplied with pure carbon, hydrogen, oxygen, and nitrogen, phosphorus, sulphur, and the like, would as infallibly die as the animal in his bath of smelling-salts, though it would be surrounded by all the constituents of protoplasm.

Carbon, hydrogen, oxygen, and nitrogen are all lifeless bodies.

Of these, carbon and oxygen unite in certain proportions and under certain conditions, to give rise to carbonic acid; hydrogen and oxygen produce water; nitrogen and other elements give rise to nitrogenous salts.

We think fit to call different kinds of matter carbon, oxygen, hydrogen, and nitrogen, and to speak of the various powers and activities of these substances as the properties of the matter of which they are composed.