GOLDEN a.
densis), with a thick knotted rootstock and large rounded leaves. -- Golden sulphide, or sulphuret, of antimony (Chem.), the pentasulphide of antimony, a golden or orange yellow powder. -- Golden warbler (Zoöl.), a common American wood warbler (Dendroica æstiva); -- called also blue-eyed yellow warbler, garden warble…
GREEN a.
-- Green fire (Pyrotech.), a composition which burns with a green flame. It consists of sulphur and potassium chlorate, with some salt of barium (usually the nitrate), to which the color of the flame is due. -- Green fly (Zoöl.), any green species of plant lice or aphids, esp. those that infest greenhouse plants. -…
HYDROFLUORIC a.
s action, and having a strong, pungent, suffocating odor. It is produced by the action of sulphuric acid on fluorite, and is usually collected as a solution in water. It attacks all silicates, as glass or porcelain, is the agent employed in etching glass, and is preserved only in vessels of platinum, lead, caoutchouc,…
HYDROGEN n.
igin. It may by produced in many ways, but is chiefly obtained by the action of acids (as sulphuric) on metals, as zinc, iron, etc. It is very inflammable, and is an ingredient of coal gas and water gas. It is standard of chemical equivalents or combining weights, and also of valence, being the typical monad. Symbol H.…