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Paul, Les

(Encyclopedia)Paul, Les, 1915–2009, American guitarist and inventor, b. Waukesha, Wis., as Lester William Polsfuss (later Polfuss). He began playing country music a...

Pawtucket

(Encyclopedia)Pawtucket pətəkˈət [key], city (1990 pop. 72,644), Providence co., NE R.I., on the Blackstone River at Pawtucket Falls; settled 1671, inc. 1885 after the eastern section (which was part of Massach...

Orbiting Geophysical Observatory

(Encyclopedia)Orbiting Geophysical Observatory (OGO), series of six orbiting observatories (see observatory, orbiting) launched between 1964 and 1969 by the National Aeronautics and Space Administration (NASA) to s...

Kesey, Ken Elton

(Encyclopedia)Kesey, Ken Elton, 1935–2001, American novelist and counterculture figure, b. La Junta, Colo.; grad. Univ. of Oregon (1957), Stanford Univ. (1960). While a student he volunteered for a hospital study...

Centralia

(Encyclopedia)Centralia sĕntrāˈlēə [key]. 1 City (2020 pop. 12,182), Clinton and Marion counties, S Il...

synapse

(Encyclopedia)synapse sĭnˈăps [key], junction between various signal-transmitter cells, either between two neurons or between a neuron and a muscle or gland. A nerve impulse reaches the synapse through the axon,...

thermionic emission

(Encyclopedia)thermionic emission thûrmˌīŏnˈĭk [key], emission of electrons or ions by substances that are highly heated, the charged particles being called thermions. The number of thermions emitted increase...

Rockefeller Center

(Encyclopedia)Rockefeller Center, complex of buildings in central Manhattan, New York City, between 48th and 51st streets and Fifth Ave. and the Ave. of the Americas (Sixth Ave.). The project was sponsored by John ...

Baltimore & Ohio Railroad

(Encyclopedia)Baltimore & Ohio Railroad (B&O), first U.S. public railroad, chartered in 1827 by a group of Baltimore businessmen to regain trans-Allegheny traffic lost to the newly opened Erie Canal. Constr...

Etna

(Encyclopedia)Etna or Aetna both: ĕtˈnə [key], volcano, 10,958 ft (3,340 m) high, on the east coast of Sicily, S Italy. One of the most active volcanoes in the world, it also is the highest active volcano in Eur...