hydrogen

(hi’dro-jen) (Gr. téwp water + γεννᾶν to produce]. A light, inflammable, gaseous element, odorle and tastele . Its symbol is H; atomic weight, 1; specific gravity, 0.069. Hydrogen readily enters and goes out of chemic combinations, and it is to this fact that acids owe their property of forming salts by substitution of bases or the hydrogen ot the acids. Ὦ. dioxid. Same as h. peroxid. disulphid, an ill-smelling gas, H,S: rit sued by putrefaction of albuminous substances. Ὦ. monoxid, water, H,O. h. peroxid, a strongly disinfectant cleansing and leaching liquid, H,O,: used mainly as a wash or spray. Dose, $-2 dr. (2-8 c.c.). h, selenid, a poisonous gas, H,Se: its inhalation causes an obstinate coryza and destroys the sense of smell. sulphureted h., h. sulphid, hydrosulphuric acid. See acid.