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METHOD OF WEIGHING GASES.
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pint of nitrogen weighs 10+4/10 grains, or a cubic foot weighs 1+1/6 ounce. That is the weight of the nitrogen. The oxygen is heavier: a pint of it weighs 11+9/10 grains, and a cubic foot weighs 1+3/4 ounce. A pint of air weighs about 10+7/10 grains, and a cubic foot 1+1/6 ounce.
Fig. 25.
You have asked me several times, and I am very glad you have, "How do you weigh gases?" I will shew you; it is very simple, and easily done. Here is a balance, and here a
