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One of his first investigations was reported in 1766, when he communicated to the Royal Society his experiments for ascertaining the properties of carbonic-acid and hydrogen gas, in which he first showed the possibility of weighing permanently elastic fluids, although Torricelli had before this shown the relative weights of a column of air and a column of mercury.
On the other hand, we have a globe of the same materials and at the same distance from the sun, with a maximum temperature of freezing water, and a minimum not very far from the absolute zero, the monthly mean being probably much below the freezing point of carbonic-acid gas a difference entirely due to the absence of these three favourable conditions.
They grew out of the fact that near by was a valley from which arose at times carbonic-acid gas in sufficient quantity to kill small animals running over certain low places. But the upas played no part, though the juice of the tree is poisonous. Batavia is the capital of the Dutch East Indies.
In this they resemble the diamond; when the chemist has found that the diamond affords no other substance by its combustion than pure carbonic-acid gas, and that the only chemical difference between the costliest diamond and a lump of pure charcoal is a proportion of hydrogen less than 1/100000 part of the weight of the substance, can the chemist make you a diamond?
It is the microscopic yeast-plant which, by seizing on certain atoms of the molecule, liberates the remaining atoms in the form of carbonic-acid and alcohol, thus effecting fermentation; it is another microscopic plant a bacterium, as Devaine had christened it which in a similar way effects the destruction of organic molecules, producing the condition which we call putrefaction.
Chalk in fact is a compound of carbonic-acid gas and lime; and when you make it very hot, the carbonic acid flies away and the lime is left. By this method of procedure we see the lime, but we do not see the carbonic acid.
But we loved Ferry for loving each and every one of us beyond his desert, and for a love which went farther yet, we fancied, when it lived and kept its health in every insalubrious atmosphere, from the sulphurous breath of old Dismukes to the carbonic-acid gas of Gholson's cant. We made great parade of recognizing his defects; it had all the fine show of a motion to reconsider.
Breathing is a mechanical, or a mechanico-vital, act; the mechanical principle involved is the same as that involved in the working of a bellows, but the oxidation of the blood when the air enters the lungs is a chemical act, or a chemico-vital act. The air gives up a part of its oxygen, which goes into the arterial circulation, and its place is taken by carbonic-acid gas and watery vapor.
Ingenhouz, some plants purified less air than others that is, they perspired less in the sunshine; and Mr. Scheele found that by putting peas into water which about half covered them they converted the vital air into fixed air, or carbonic-acid gas, in the same manner as in animal respiration. The circulation in the lungs or leaves of plants is very similar to that of fish.
"So it was, and doubtless is here," replied Cortlandt; "but you must remember that both those qualities would be given it by carbonic-acid gas, which is entirely invisible and transparent.
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