"If we pass a current of electricity through this sealed jar containing oxygen and hydrogen in mechanical union, the spark that leaps across the points furnishes the heat, and a drop of water appears and falls to the bottom.

The more or less strongly marked basic character of these bodies, the presence of nitrogen as an essential element, and, above all, the analogy shown to ammonia in the way these bases united with acids to form salts, not by replacement of the hydrogen of the acid, but by direct addition of acid and base, pointed unmistakably to this constitution.

Being a poor conductor, it retains the heat, and furnishes a store rich in carbon and hydrogen for use in the body.

The elimination of hydrogen from the cathode must be avoided, or at any rate must not accumulate.

In mentioning the constituents of the atmosphere, he adopts without explanation the loose statement of some of the books, placing carburetted hydrogen on the same footing as to constancy and amount with carbonic acid, and making no allusion to nitric acid.

As the wind set toward us, we soon became aware of an evil smell petroleum and sulphuretted hydrogen at oncewhich gave some of us a headache.

CHARLES, a French physicist, born at Beaugency; was the first to apply hydrogen to the inflation of balloons (1746-1823).

In order to facilitate the disengagement of hydrogen during the reaction, care must be taken to form apertures in the zinc plates, and to incline the first lower row with respect to the bottom of the vessel.