SAFETY n.
ecially, a bent funnel tube with bulbs for adding those reagents which produce unpleasant fumes or violent effervescence. -- Safety valve, a valve which is held shut by a spring or weight and opens automatically to permit the escape of steam, or confined gas, water, etc., from a boiler, or other vessel, when the press…
SPONGE n.
uminous tree (Acacia Farnesiana), with deliciously fragrant flowers, which are used in perfumery. -- Toilet sponge, a very fine and superior variety of Mediterranean sponge (Spongia officinalis, variety Mediterranea); -- called also turkish sponge. -- To set a sponge (Cookery), to leaven a small mass of flour, to be…
STANNIC a.
also normal stannic acid. (b) Metastannic acid. -- Stannic chloride, a thin, colorless, fuming liquid, SnCl4, used as a mordant in calico printing and dyeing; -- formerly called spirit of tin, or fuming liquor of Libavius. -- Stannic oxide, tin oxide, SnO2, produced artificially as a white amorphous powder, and occu…
SULPHURIC a.
duced by the combined action of sulphur dioxide, oxygen (from the air), steam, and nitric fumes. It attacks and dissolves many metals and other intractable substances, sets free most acids from their salts, and is used in the manufacture of hydrochloric and nitric acids, of soda, of bleaching powders, etc. It is also p…