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1846: Carl Zeiss founded Carl Zeiss AG, to mass-produce microscopes and other optical instruments. 1850s: John Leonard Riddell, Professor of Chemistry at Tulane University, invents the first practical binocular microscope. [13] 1863: Henry Clifton Sorby develops a metallurgical microscope to observe structure of meteorites.
1850 Inverted microscope. An inverted microscope is a microscope with its light source and condenser on the top, above the stage pointing down, while the objectives and turret are below the stage pointing up. The inverted microscope was invented in 1850 by J. Lawrence Smith, a faculty member of Tulane University and the Medical College of ...
1890s: Frédéric Swarts invents the first chlorofluorocarbons to be applied as refrigerant. [443] 1890: Robert Gair would invent the pre-cut cardboard box. [444] 1891: Whitcomb Judson invents the zipper. 1892: Léon Bouly invents the cinematograph. 1892: Thomas Ahearn invents the electric oven. [445]
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Camera lenses of R and J Beck are known as Beck Ensign, and the Frena camera was developed in the 1890s, using celluloid films. [6]A catalogue of work [7] by R & J Beck from 1900 has been digitised as part of the Internet Archive which features the terms of business and pricing from 1900, simplex microscopes, No. 10 London Microscope, No. 22 London Microscope, No. 29 London Microscope, Beck ...
The following articles cover the timeline of United States inventions: Timeline of United States inventions (before 1890), before the turn of the century; Timeline of United States inventions (1890–1945), before World War II; Timeline of United States inventions (1946–1991), during the Cold War
U.S. territorial extent in 1860. April 3, 1860 – Pony Express begins. November 6 – 1860 United States presidential election: Abraham Lincoln elected president and Hannibal Hamlin vice president with only 39% of the vote in a four-man race. December 18 – Crittenden Compromise fails. December 20 – President Buchanan fires his cabinet.
1620: Appearance of the first compound microscopes in Europe. 1628: Willebrord Snellius: the law of refraction also known as Snell's law. 1628: William Harvey: blood circulation. 1638: Galileo Galilei: laws of falling bodies. 1643: Evangelista Torricelli invents the mercury barometer. 1662: Robert Boyle: Boyle's law of ideal gases.