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missal

(Encyclopedia)missal [Lat.,=of the mass], in the Roman Catholic Church, liturgical book containing all directions and texts necessary for the performance of Mass throughout the year. The Roman Missal (Missale Roman...

Young, Charles Augustus

(Encyclopedia)Young, Charles Augustus, 1834–1908, American astronomer, b. Hanover, N.H., grad. Dartmouth, 1853. He discovered the reversing layer of the solar atmosphere and proved the gaseous nature of the sun's...

Thoma, Ludwig

(Encyclopedia)Thoma, Ludwig lo͝otˈvĭkh [key], 1867–1921, German novelist, dramatist, and poet. Thoma satirized Bavarian rural and small-town life. His serious peasant novels Andreas Vöst (1905), Der Wittiber ...

Quidor, John

(Encyclopedia)Quidor, John kĭdôrˈ [key], 1801–81, American painter, b. Tappan, N.Y., studied with J. W. Jarvis. Little appreciated in his own time, he was subsequently accorded a place among the best early Ame...

Pordenone, Giovanni Antonio de

(Encyclopedia)Pordenone, Giovanni Antonio de jōvänˈnē äntôˈnyō dā pōrdānôˈnā [key], c.1484–1539, Venetian painter. His real name was Giovanni Antonio de Sacchis. He studied in Venice and probably in...

equivalent weight

(Encyclopedia)equivalent weight. The equivalent weight of an element or radical is equal to its atomic weight or formula weight divided by the valence it assumes in compounds. The unit of equivalent weight is the a...

Mill, James

(Encyclopedia)Mill, James, 1773–1836, British philosopher, economist, and historian, b. Scotland; father of John Stuart Mill. Educated as a clergyman at Edinburgh through the patronage of Sir John Stuart, Mill ga...

mineral

(Encyclopedia)mineral, inorganic substance occurring in nature, having a characteristic and homogeneous chemical composition, definite physical properties, and, usually, a definite crystalline form. A few of the mi...

Consalvi, Ercole

(Encyclopedia)Consalvi, Ercole ārkôˈlā kōnsälˈvē [key], 1757–1824, Italian cardinal and papal diplomat. In his first term (1800–1806) as secretary of state for Pope Pius VII he negotiated the Concordat ...

combining weight

(Encyclopedia)combining weight, the proportion (by weight) in which a chemical element combines with other elements to form compounds. The determination of combining weights was a very important part of early chemi...