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Updated: June 12, 2025
The several constituents of the ash and the mineral added to the raw paper are ascertained as follows: Sufficient of the paper is calcined in the manner described; a known quantity of the ash is weighed and thrown into a small porcelain dish containing a little distilled water and an excess of chemically pure hydrochloric acid.
Over the flint he laid a piece of brown paper, chemically treated, then he struck the flint a sharp blow with the steel, a spark was produced, the spark ignited the paper, it began to burn in a smoldering, blazeless way, he stuffed the paper into the bowl of his pipe, and began the smoke that was to carry him over the journey home.
They are azotized, and contain quite a marked amount of nitrogen. Chemically, they consist of carbon 19, hydrogen 10, nitrogen 4, oxygen 4. Some allowance is therefore to be made for them as plastic food. "Good black tea contains of theine from 2.00 to 2.13 per cent. Coffee-leaves contain of theine from 1.15 to 1.25 per cent. Paraguay tea contains of theine from 1.01 to 1.23 per cent.
In regard, for instance, to the riddle of development and morphogenesis, we must simply accept it as a “given property,” that the acorn grows in an oak and nothing else. The chemical explanation of the vital functions of protoplasm is also to be rejected; as a shattered watch is no longer a watch though it remains chemically the same, so it is with protoplasm.
It is bulky and of an awkward shape, it is heavy, it is completely incombustible, it is chemically unstable, and its decomposition yields great volumes of highly odorous gases, and it nevertheless contains identifiable structures of the highest degree of permanence. It is extremely difficult to preserve unchanged, and it is still more difficult completely to destroy.
A rank odor of beet-root sugar rose from the far-branching sheds where some freight steamers of the line lay, and seemed to mingle chemically with the noise which came up from the wharf next to the Norumbia.
Boiling in open pans with caustic soda lye is insufficient to reduce the wood to pulp, and so boiling in strong vessels under pressure is adopted. Let us see what may result chemically from the attainment of such high temperatures of water in our steam boilers working under high pressures.
This you will see abundantly illustrated by the examples which I have prepared, as also the constancy of the angles of like faces. Chemically speaking, the crystal is always a perfect chemical body, and can never be a mechanical mixture.
"An essential part of Edison's discovery of active masetials for an alkaline storage battery was the PREPARATION of these materials. Metallic powder of iron and nickel, or even oxides of these metals, prepared in the ordinary way, are not chemically active in a sufficient degree to work in a battery.
And yet, no one knows better than the academies of Science, themselves, that their learned professors would quickly starve to death, if they were compelled to produce their food from the chemical properties of the rocks. They can make a grain of wheat chemically perfect, but they cannot make the invisible germ by which it will grow, become fruitful, and reproduce itself.
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