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United States Naval Observatory

(Encyclopedia)United States Naval Observatory, a federal astronomical observatory, located in Washington, D. C. It evolved from the Navy's oldest scientific institution, the Depot of Charts and Instruments, founded...

Pickering, Timothy

(Encyclopedia)Pickering, Timothy, 1745–1829, American political leader and Revolutionary War army officer, b. Salem, Mass. He was admitted to the bar (1768) and played an active part in pre-Revolutionary activiti...

White House

(Encyclopedia)White House, official name of the executive mansion of the President of the United States. It is on the south side of Pennsylvania Ave., Washington, D.C., facing Lafayette Square. The building, constr...

Dove, Arthur Garfield

(Encyclopedia)Dove, Arthur Garfield dŭv [key], 1880–1946, American painter, b. Canandaigua, N.Y. Early in his career he did commercial illustration in New York City. Following a European trip (1907–9), he adop...

Daughters of the American Revolution

(Encyclopedia)Daughters of the American Revolution (DAR), a Colonial patriotic society in the United States, open to women having one or more ancestors who aided the cause of the Revolution. The society was organiz...

Fischer, Edmond Henri

(Encyclopedia)Fischer, Edmond Henri, 1920–, American biochemist, b. Shanghai, China. As researchers at the Univ. of Washington in Seattle, Fischer and Edwin G. Krebs discovered a biological regulatory mechanism, ...

Erlanger, Joseph

(Encyclopedia)Erlanger, Joseph ûrˈlăng-ər [key], 1874–1965, American scientist, b. San Francisco, grad. Univ. of California (B.S., 1895), M.D. Johns Hopkins, 1899. For his contributions to physiology, especia...

Hyatt, Alpheus

(Encyclopedia)Hyatt, Alpheus, 1838–1902, American zoologist, b. Washington, D.C., grad. Harvard, 1862. He was a devoted follower of Louis Agassiz. From 1870, Hyatt was custodian and later curator of the Boston So...

Harrisonburg

(Encyclopedia)Harrisonburg, city (2020 pop. 51,814), seat of Rockingham co., NW Va., in the Shenandoah Valley; settled 1739, inc. 1916. It is a processing center in a...

Hagen, Johannes Georg

(Encyclopedia)Hagen, Johannes Georg yōhäˈnəs gāˈôrk häˈgən [key], 1847–1930, American astronomer and mathematician, b. Austria. A Jesuit, he came in 1880 to the United States to teach. In 1888 he was ma...