VACUUM n.
eric pressure and hence also at a lower temperature, which largely obviates the danger of burning the sugar, and shortens the process. -- Vacuum pump. Same as Pulsometer, 1. -- Vacuum tube (Phys.), a glass tube provided with platinum electrodes and exhausted, for the passage of the electrical discharge; a Geissler tu…
WATCH n.
etimes fired on shipboard at 8 p. m., when the night watch begins. -- Watch light, a low-burning lamp used by watchers at night; formerly, a candle having a rush wick. -- Watch night, The last night of the year; -- so called by the Methodists, Moravians, and others, who observe it by holding religious meetings lastin…
ZINC n.
also flowers of zinc, philosopher's wool, nihil album, etc. The impure oxide produced by burning the metal, roasting its ores, or in melting brass, is called also pompholyx, and tutty. -- Zinc spinel (Min.), a mineral, related to spinel, consisting essentially of the oxides of zinc and aluminium; gahnite. -- Zinc vi…