(Encyclopedia)
CE5
Blast furnace for production of iron
blast furnace, structure used chiefly in smelting. The principle involved in this means of extracting metals is that of the reduction of…
(Encyclopedia) Reber, Gröte, 1911–2002, American radio engineer, b. Chicago, Ill. After graduating from the Armour Institute of Technology (now the Illinois Institute of Technology) in 1933, Reber…
(Encyclopedia) videocassette recorder (VCR), device that can record television programs or the images from a video camera on magnetic tape (see tape recorder); it can also play prerecorded tapes. A…
(Encyclopedia) limestone, sedimentary rock wholly or in large part composed of calcium carbonate. It is ordinarily white but may be colored by impurities, iron oxide making it brown, yellow, or red…
(Encyclopedia) Ruisdael or Ruysdael, Jacob vanRuisdael or Ruysdael, Jacob vanboth: yäˈkōp vän roisˈdäl [key], c.1628–1682, Dutch painter and etcher, the most celebrated of the Dutch landscape…
How Did We Get Here?Theories of the UniverseEvolution vs. CreationismIt's a Matter of OpinionHow Did We Get Here?And God Said … I wanted to spend some time discussing ideas about the nature of…
(Encyclopedia) gamma radiation, high-energy photons emitted as one of the three types of radiation resulting from natural radioactivity. It is the most energetic form of electromagnetic radiation,…
