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hardness

(Encyclopedia)hardness, property of matter commonly described as the resistance of a substance to being scratched by another substance. The degree of hardness is relative, different substances being compared with o...

condensation

(Encyclopedia)condensation, in physics, change of a substance from the gaseous (vapor) to the liquid state (see states of matter). Condensation is the reverse of vaporization, or change from liquid to gas. It can b...

Ellsberg, Daniel

(Encyclopedia)Ellsberg, Daniel, 1931–2023, American political activist, b. Chicago, grad. Columbia Univ. (B.S., 1952, Ph.D., 1959). After serving in the U.S. Marine...

Shelley, Mary Wollstonecraft

(Encyclopedia)Shelley, Mary Wollstonecraft, 1797–1851, English author; daughter of William Godwin and Mary Wollstonecraft. In 1814 she fell in love with the poet Percy Bysshe Shelley, accompanied him abroad, and ...

Toland, John

(Encyclopedia)Toland, John tōˈlənd [key], 1670–1722, British deist, b. Ireland. Brought up a Roman Catholic, Toland became a Protestant at 16. He studied at Glasgow, Edinburgh, and Leiden and after 1694 lived ...

Reuchlin, Johann

(Encyclopedia)Reuchlin, Johann yōˈhän roikhˈlən [key], 1455–1522, German humanist and lawyer, a scholar of Greek and Hebrew, b. Baden. He taught jurisprudence at Tübingen. In 1492 he began the study of Hebr...

protoplasm

(Encyclopedia)protoplasm, term once used for the fundamental material of which all living things were thought to be composed. It was studied by a number of early scientists, especially by Félix Dujardin, J. E. Pur...

Waksman, Selman Abraham

(Encyclopedia)Waksman, Selman Abraham wäksˈmən [key], 1888–1973, American microbiologist, b. Priluka, Russia, grad. Rutgers (B.S. 1915), Ph.D. Univ. of California, 1918. He went to the United States in 1910 an...

Casanova de Seingalt, Giovanni Giacomo

(Encyclopedia)Casanova de Seingalt, Giovanni Giacomo kăzənōˈvə, Ital. jōvänˈnē jäˈkōmō käzänōˈvä dā sāngältˈ [key], 1725–98, Venetian adventurer, author, and celebrated libertine. He studied...

Boyle, Robert

(Encyclopedia)Boyle, Robert, 1627–91, Anglo-Irish physicist and chemist. The seventh son of the 1st earl of Cork, he was educated at Eton and on the Continent and conducted most of his researches at his own labor...