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Sulphurous Acid (This is a be taken as evidence)

This is a be taken as evidence of the presence of this gaseous combination of 1 equivalent of sulphur substance. and 2 of oxygen, having a specific gravity of 4072. Air. The air or atmosphere 1.45, and very soluble in water, which will which surrounds the earth is a mixture (not absorb 30 times its volume of the gas. Its combination-Fownes) of 77 parts by weight 1 MISCELLANEOUS CHEMICALS. lic lustre when rubbed. (or 79.19 parts by measure) of nitrogen, and 4076. Tests for the Presence of Gold 23 parts by weight (or 20.81 by measure) of in Solutions. Protosulphate of iron gives oxygen. It usually contains also a variable a brown precipitate, which acquires a metalamount of moisture , a very small proportion of carbonic acid, a trace of ammonia, and Protochloride of tin (preferably containing sometimes of carburetted hydrogen; these a little perchloride) gives a violet, purple, or last are found incidentally in the air, in a variable degree. It is the standard in the comparative or specific gravity of gaseous bodies. (See No. 47.) At 60° Fahr., and with the barometer at 30 inches, 100 cubic inches of air weigh 30.935 grains; and ater (the standard of specific gravity for fluids) weighs just 816 times as much as air.