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Yerkes Observatory
(Encyclopedia) Yerkes Observatory, astronomical observatory located in Williams Bay, Wis., on the shore of Lake Geneva. It was founded in 1892 with funds provided by Charles T. Yerkes and its first…blasting
(Encyclopedia) blasting, shattering, breaking, or splitting of rock or other material by the discharge of an explosive placed within or in contact with it. It is a necessary part of many engineering…Surabaya
(Encyclopedia) Surabaya,&sp;Surabaja, or SoerabajaSurabaya,s&oobreve;rəbīˈə, Du. s&oomacr;räbäˈyä [key], city (1990 pop. 2,473,272), capital of East Java prov., NE Java, Indonesia, on the…Perrin, Jean Baptiste
(Encyclopedia) Perrin, Jean BaptistePerrin, Jean BaptistezhäN bätēstˈ pĕrăNˈ [key], 1870–1942, French physicist. From 1910 to 1940 he was professor at the Univ. of Paris, and in 1941 he came to the…personal watercraft
(Encyclopedia) personal watercraft (PWC), a lightweight vessel usually less than 16 ft (5 m) long that uses an inboard water jet pump, powered by an internal-combustion engine, as its primary source…Rosse, William Parsons, 3d earl of
(Encyclopedia) Rosse, William Parsons, 3d earl ofRosse, William Parsons, 3d earl ofrôs [key], 1800–1867, British astronomer and constructor of telescopes. He served as member of Parliament for King's…Puryear, Martin
(Encyclopedia) Puryear, Martin, 1941–2019, American sculptor, b. Washington, D.C. An African American, he served in the Peace Corps in Sierra Leone, and became interested in African crafts and in the…pyroclastic flow
(Encyclopedia) pyroclastic flow, turbulent, fluidized mixture of rock, volcanic ash, and hot gas that moves like an avalanche away from a volcanic eruption. A pyroclastic flow may contain a mix of…ocelot
(Encyclopedia) ocelotocelotäsˈəlŏtˌ, ōˈsə– [key], medium-sized cat, Leopardus pardalis, of Central and South America. It is occasionally found as far N as Texas. The ocelot has a yellow-brown coat…ass
(Encyclopedia) ass, hoofed, herbivorous mammal of the genus Equus, closely related to the horse. It is distinguished from the horse by its small size, large head, long ears, and small hooves. There…Trending
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