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PROOFS OF THE PROPERTIES OF HIDROGEN GAS

SECT. II.

EXPERIMENTAL PROOFS

OF

THE PROPERTIES OF HIDROGEN GAS.

Experiment I.

Hidrogen gas is considerably lighter than atmospheric air.

FILL a receiver or wide-mouthed bottle with hidrogen gas,and let it stand for a few minutes with its open mouth upwardsexposed to the air. On letting down a lighted candle into thebottle the gas will be found to have escaped, for the candle willburn with its usual splendor.

If another jar filled with the gas be placed with its mouthdownwards the air will be prevented from ascending by thebottom and sides of the vessel, as may be proved by inserting alighted candle, which will be instantly extinguished.

Experiment II.

Soap bubbles filled ivith hidrogen gas ascend rapidly.

Fill with hidrogen gas, a bladder, and adapt to it a commontobacco pipe; dip the bowl of the pipe into a lather of soap,squeeze it gently in order to form a bubble, and detach it in theusual manner. These bubbles will rise rapidly into the air; if