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  2. Lists of United States network television schedules - Wikipedia

    en.wikipedia.org/wiki/Lists_of_United_States...

    The variously three to six larger commercial U.S. television networks each has its schedule. which is altered each year (and usually more frequently), and the introductions and relevant articles provide a comprehensive review for each year, from the 1946 season to the present.

  3. William Hyde Wollaston - Wikipedia

    en.wikipedia.org/wiki/William_Hyde_Wollaston

    His optical work was important as well, where he is remembered for his observations of dark gaps in the solar spectrum (1802), [7] [8] a key event in the history of spectroscopy. He invented the camera lucida (1807) which contained the Wollaston prism (the four-sided optics of which were first described basically by Kepler ) [ 9 ] and the ...

  4. Psychrometrics - Wikipedia

    en.wikipedia.org/wiki/Psychrometrics

    With the inventions of the hygrometer and thermometer, the theories of combining the two began to emerge during the sixteenth and seventeenth centuries. In 1818, a German inventor, Ernst Ferdinand August (1795-1870), patented the term “psychrometer”, from the Greek language meaning “cold measure”.

  5. Hygrometer - Wikipedia

    en.wikipedia.org/wiki/Hygrometer

    A hygrometer is an instrument which measures the humidity of air or some other gas: that is, how much of it is water vapor. [1] Humidity measurement instruments usually rely on measurements of some other quantities such as temperature, pressure, mass, and mechanical or electrical changes in a substance as moisture is absorbed.

  6. List of programs broadcast by the History Channel - Wikipedia

    en.wikipedia.org/wiki/List_of_programs_broadcast...

    The Haunted History of Halloween; Heavy Metal; Heroes Under Fire; Hidden Cities; Hidden House History; High Hitler; High Points in History; Hillbilly: The Real Story; History Alive; History Films; History in Color; History Now; History of Angels [19] A History of Britain; A History of God [20] History of the Joke; The History of Sex; History ...

  7. History of television - Wikipedia

    en.wikipedia.org/wiki/History_of_television

    A television set, also called a television receiver, television, TV set, TV, or telly, is a device that combines a tuner, display, and speakers for the purpose of viewing television. Introduced in the late 1920s in mechanical form, television sets became a popular consumer product after World War II in electronic form, using cathode ray tubes ...

  8. Wilhelm Lambrecht - Wikipedia

    en.wikipedia.org/wiki/Wilhelm_Lambrecht

    Klinkerfues had developed a bifilar-hygrometer which was widely used but did not prove in laymen's hands. After that Lambrecht built a hair hygrometer , "Model Klinkerfues". In 1873, after separation from Klinkerfues, Lambrecht started to build new meteorological instruments such as polymeters, dew point monitors, and aspiration psychrometers .

  9. Michell Instruments - Wikipedia

    en.wikipedia.org/wiki/Michell_Instruments

    The original company, Michell Instruments Ltd, was formed in 1974 in Cambridge, England, by Andrew Michell.In co-operation with scientists at Cambridge University, Michell developed a novel aluminium oxide dew-point sensor based on the thin-film capacitance principle originally proposed by Dr A C Jason et al. at the Torry Research Institute, Aberdeen, UK in the 1950s.