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Nernst, Walther Hermann

(Encyclopedia)Nernst, Walther Hermann välˈtər hĕrˈmän nĕrnst [key], 1864–1941, German physicist and chemist, a founder of modern physical chemistry. After doing outstanding research on osmotic pressure and...

cataract

(Encyclopedia)cataract, in medicine, opacity of the lens of the eye, which impairs vision. In the young, cataracts are generally congenital or hereditary; later they are usually the result of degenerative changes b...

national bank

(Encyclopedia)national bank, in the United States, financial institution of a class authorized by Congress in acts of 1863 and 1864. The acts were intended to provide a way of marketing the large bond issues made n...

Haggai

(Encyclopedia)Haggai hăgˈāī [key], prophetic book of the Bible. Dated 520 b.c., it is a collection of five oracles addressed to Jews, newly returned from the Babylonian exile. The prophet summons the people to ...

Bain, Alexander

(Encyclopedia)Bain, Alexander, 1818–1903, Scottish philosopher and psychologist. He was educated at Marischal College, Aberdeen, where he later taught for three years. He taught one year (1845) at Anderson's Univ...

Nehemiah, book of the Bible

(Encyclopedia)Nehemiah, originally combined with Ezra to form a single book in the Hebrew canon. In the Septuagint, Ezra and Nehemiah are combined as Second Esdras. The book narrates the return to Jerusalem of Nehe...

Weil, Simone

(Encyclopedia)Weil, Simone sēmônˈ vīl [key], 1909–43, French philosopher and mystic. After receiving her baccalauréat with honors at 15, she studied philosophy for four years, then entered (1928) the prestig...

curium

(Encyclopedia)curium kyo͝orˈēəm [key], artificially produced radioactive chemical element; symbol Cm; at. no. 96; mass no. of most stable isotope 247; m.p. about 1,340℃; b.p. 3,110℃; sp. gr. 13.5 (calculate...

radiation

(Encyclopedia)radiation rāˌdēāˈshən [key], term applied to the emission and transmission of energy through space or through a material medium and also to the radiated energy itself. In its widest sense the te...

vapor pressure

(Encyclopedia)vapor pressure, pressure exerted by a vapor that is in equilibrium with its liquid. A liquid standing in a sealed beaker is actually a dynamic system: some molecules of the liquid are evaporating to f...