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Torricelli, Evangelista

(Encyclopedia)Torricelli, Evangelista āvänjālēˈstä tōr-rēchĕlˈlē [key], 1608–47, Italian physicist and mathematician. He was Galileo's secretary (1641–42) and his successor as professor of philosophy...

Purkinje, Johannes Evangelista

(Encyclopedia)Purkinje, Johannes Evangelista yōhänˈəs āˌväng-gālĭsˈtä po͝orˈkĭnyā [key], 1787–1869, Czech physiologist. While professor (1823–50) at the Univ. of Breslau he pioneered in establish...

vacuum

(Encyclopedia)vacuum, theoretically, space without matter in it. A perfect vacuum has never been obtained; the best human-generated vacuums contain less than 100,000 gas molecules per cc, compared to about 30 billi...

barometer

(Encyclopedia)CE5 Aneroid barometer barometer bərŏmˈətər [key], instrument for measuring atmospheric pressure. It was invented in 1643 by the Italian scientist Evangelista Torricelli, who used a column...

Puy de Dôme

(Encyclopedia)Puy de Dôme, extinct volcano of the Massif Central and the second highest peak (4,806 ft/1,465 m) of the Auvergne Mts., central France, W of Clermont-Ferrand. Crops are raised on the lower slopes; th...

Parmigianino

(Encyclopedia)Parmigianino –jäˈnō [key], 1503–40, Italian painter and etcher, one of the most sensitive mannerist artists (see mannerism) and one of the period's finest draftsmen. His real name was Girolamo ...

meteorology

(Encyclopedia)meteorology, branch of science that deals with the atmosphere of a planet, particularly that of the earth, the most important application of which is the analysis and prediction of weather. Individual...