VAPOR n.
apor burner, a burner for burning a vaporized hydrocarbon. -- Vapor density (Chem.), the relative weight of gases and vapors as compared with some specific standard, usually hydrogen, but sometimes air. The vapor density of gases and vaporizable substances as compared with hydrogen, when multiplied by two, or when com…
WEATHER MAP n.
gion. Such maps usually show the height of the barometer, the temperature of the air, the relative humidity, the state of the weather, and the direction and velocity of the wind. Isobars and isotherms outline the general distribution of temperature and pressure, while shaded areas indicate the sections over which rain…
WHEN adv.
what time; at, during, or after the time that; at or just after, the moment that; -- used relatively. Kings may Take their advantage when and how they list. Daniel. Book lore ne'er served, when trial came, Nor gifts, when faith was dead. J. H. Newman.