CONDENSER

apparatus for cooling a@ vapor so as to change it to a liquid (e.g.) the exhaust steam of a steam engine; apparatus for compre ing gases; instrument for concentrating an electric charge (see Luyppn Jar); a lens or system of lenses to concentrate light, especially in microscope or in optical lantern; appliance used in manufacturing woolens. DE (1715-80), Fr. philosopher; took orders, but devoted all his time to study of B gerne spttr follower of Locke and friend of Rou eau; wrote E ai sur Tratte des Sensations is his greatest work. He contends that everything is due to sensation, and nothing to heredity. Though himself religious, his thought, while clear, is hard and unspiritual; his work infiuenced subsequent Eng. philosophers, but was severely criticized by the eclectic philosophers of the first half of the 19th cent. Time has shown that his ideas agree with the psychophysiological discoveries of modern times. large bird of prey inhabiting the Andes of 8. America. It can fly at great altitudes (over 20,000 ft.), and sail in the air without flapping the wings, which may measure 10 ft. between the tips: The head and neck are devoid of feathers. O’s are exceedingly voracious, and gorge themselves with carrion—sheep, calves, etc.—till they are dazed, when they can be easily caught.