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Camborne-Redruth

(Encyclopedia)Camborne-Redruth kămˈbôrn, –bûrn, rĕdˈro͞oth [key], town, Cornwall, SW Engla...

Visser't Hooft, Willem Adolph

(Encyclopedia)Visser't Hooft, Willem Adolph vĭlˈəm äˈdôlf vĭsˈĕrt hōft [key], 1900–1985, Dutch clergyman, a leader of the Protestant ecumenical movement, b. Haarlem, Netherlands, and educated at Univ. o...

water glass

(Encyclopedia)water glass or soluble glass, colorless, transparent, glasslike substance available commercially as a powder or as a transparent, viscous solution in water. Chemically it is sodium silicate, potassium...

Samsonov, Aleksandr Vasilyevich

(Encyclopedia)Samsonov, Aleksandr Vasilyevich əlyĭksänˈdər vəsēˈlyəvĭch səmsôˈnəf [key], 1859–1914, Russian general. Early in World War I, when his army advanced into East Prussia (see Masuria) in o...

pilocarpine

(Encyclopedia)pilocarpine pīlōkärˈpēn [key], naturally occurring alkaloid obtained from plants of the genus Pilocarpus (family Rutaceae). By mimicking the effects of acetylcholine, pilocarpine acts as a stimul...

hydrogen chloride

(Encyclopedia)hydrogen chloride, chemical compound, HCl, a colorless, poisonous gas with an unpleasant, acrid odor. It is very soluble in water and readily soluble in alcohol and ether. It fumes in moist air. It is...

shaft sinking

(Encyclopedia)shaft sinking, excavation from the surface of an opening in the earth. Shafts, which are generally vertical, are usually distinguished from tunnels, which are horizontal. Little difficulty is experien...

hygrometer

(Encyclopedia)hygrometer hīgrŏmˈətər [key], instrument used to measure the moisture content of a gas, as in determining the relative humidity of air. The temperature at which dew or frost forms is a measure of...

lighthouse

(Encyclopedia)lighthouse, towerlike structure erected to give guidance and warning to ships and aircraft by either visible or radioelectrical means. Lighthouses were long built to conform in structure to their geog...

compressed air

(Encyclopedia)compressed air, air whose volume has been decreased by the application of pressure. Air is compressed by various devices, including the simple hand pump and the reciprocating, rotary, centrifugal, and...