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Harvard College Observatory

(Encyclopedia)Harvard College Observatory, astronomical observatory located in Cambridge, Mass., operated by Harvard (Harvard College at the time of the observatory's founding in 1839). Its equipment includes a 61-...

formyl group

(Encyclopedia)formyl group fôrˈmĭl [key], in chemistry, functional group that consists of a carbonyl group joined by a single bond to a hydrogen atom. Aldehydes are compounds that contain a formyl group joined b...

hydroxyl group

(Encyclopedia)hydroxyl group hīdrŏkˈsĭl [key], in chemistry, functional group that consists of an oxygen atom joined by a single bond to a hydrogen atom. An alcohol is formed when a hydroxyl group is joined by ...

debenture

(Encyclopedia)debenture dəbĕnˈchər [key], document acknowledging indebtedness. In Great Britain a debenture is practically the same as a bond, and debenture stock is similar to preferred stock. In the United St...

resonance, in chemistry

(Encyclopedia)resonance, in chemistry: see chemical bond. ...

Ladd, George Trumbull

(Encyclopedia)Ladd, George Trumbull, 1842–1921, American philosopher, b. Painesville, Ohio, grad. Western Reserve Univ., 1864, and Andover Theological Seminary, 1869. He taught at Yale from 1881 until his retirem...

Lathrop, George Parsons

(Encyclopedia)Lathrop, George Parsons lāˈthrəp [key], 1851–98, American author, b. near Honolulu; studied in Germany (1867–70). He was the husband of Rose Hawthorne Lathrop, the daughter of Nathaniel Hawthor...

Kemble, George Stephen

(Encyclopedia)Kemble, George Stephen: see under Kemble, Roger. ...

Kendall, George Wilkins

(Encyclopedia)Kendall, George Wilkins, 1809–67, American journalist, b. near Amherst, N.H. After a succession of journalistic jobs, he was a partner in founding (1837) the New Orleans Picayune. In 1841 he joined ...

Kennan, George Frost

(Encyclopedia)Kennan, George Frost, 1904–2005, U.S. diplomat and historian, b. Milwaukee, Wis., grad. Princeton, 1925. A brilliant strategist and among the most influential and intellectual Americans in the 20th-...