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Obed Wild and Scenic River

(Encyclopedia)Obed Wild and Scenic River: see National Parks and Monuments (table)national parks and monuments (table). ...

formula weight

(Encyclopedia)formula weight, in chemistry, a quantity computed by multiplying the atomic weight (in atomic mass units) of each element in a formula by the number of atoms of that element present in the formula, an...

troy weights

(Encyclopedia)troy weights: see English units of measurement. ...

periodic table

(Encyclopedia) CE5 periodic table, chart of the elements arranged according to the periodic law discovered by Dmitri I. Mendeleev and revised by Henry G. J. Moseley. In the periodic table the elements are arrange...

pinworm

(Encyclopedia)pinworm, roundworm, Enterobius vermicularis, worldwide in distribution and the most common source of worm infestation of humans in the United States. Children are more commonly infested than adults. A...

Ch'in, dynasty of China (221–206 b.c.)

(Encyclopedia)Ch'in chĭn [key], dynasty of China, which ruled from 221 b.c. to 206 b.c. The word China is derived from Ch'in, the first dynasty to unify the country by conquering the warring feudal states of the l...

Barnard, Henry

(Encyclopedia)Barnard, Henry, 1811–1900, American educator, b. Hartford, Conn., grad. Yale, 1830. He studied law and was admitted to the bar in 1835. As a member (1837–39) of the Connecticut legislature, he ori...

skylark

(Encyclopedia)skylark, common name for a passerine songbird (Alauda arvensis) famous for the soaring, melodious flight of the courting male. Found in Europe (except in the Mediterranean area), it is 71⁄4 in. (18....
 

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