SODIUM n.
er, and as a means of obtaining other metals (as magnesium and aluminium) is an important commercial product. Symbol Na (Natrium). Atomic weight 23. Specific gravity 0.97. Sodium amalgam, an alloy of sodium and mercury, usually produced as a gray metallic crystalline substance, which is used as a reducing agent, and ot…
SPONGE n.
f a horseshoe, answering to the heel. Bath sponge, any one of several varieties of coarse commercial sponges, especially Spongia equina. -- Cup sponge, a toilet sponge growing in a cup-shaped form. -- Glass sponge. See Glass-sponge, in the Vocabulary. -- Glove sponge, a variety of commercial sponge (Spongia officina…
TIN n.
Money. [Cant] Beaconsfield. Block tin (Metal.), commercial tin, cast into blocks, and partially refined, but containing small quantities of various impurities, as copper, lead, iron, arsenic, etc.; solid tin as distinguished from tin plate; -- called also bar tin. -- Butter of tin. (Old Chem.) See Fuming liquor of Lib…
WIRELESS a.
hers were made on the subject by Joseph Henry, Hertz, Oliver Lodge, and others, the first commercially successful system was that of Guglielmo Marconi, patented in March, 1897. Marconi employed electric waves of high frequency set up by an induction coil in an oscillator, these waves being launched into space through a…