The periscope was invented in the 1450s by a person called Johann Gutenburg so that people could see over people's heads in crowds. In World War I the design was perfected and used so that people could see up and around the corner in trench...
http://wiki.answers.com/Q/Who_invented_the_periscope
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Inventions question: When was the periscope invented? the periscope was invented by a mancalled arther ... Where were periscope invented? When was the pariscope invented? Who invented the periscope in 1430? How many periscopes where invented? When did the periscope get invented? Can a periscope be used under water?
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wiki.answers.com/Q/When_was_the_periscope_invented
wiki.answers.com/Q/When_was_the_periscope_invented
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Periscope - Wikipedia, the free encyclopedia
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A periscope is an instrument for observation from a concealed position. In its simplest form, it is a tube in each end of which are mirrors set parallel to each other at 45 degree angle. This form o...
en.wikipedia.org/wiki/Periscope
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The Navy attributes the invention of the periscope to Simon Lake and the perfection of the periscope to Sir Howard Grubb. ... A periscope, is a optical device for conducting observations from a concealed or protected position. Simple periscopes consist of reflecting mirrors and/or prisms at opposite ends of a tube container.
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inventors.about.com/library/inventors/blperiscope.htm
inventors.about.com/library/inventors/blperiscope.htm
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Ray McIntire invented Styrofoam for the Dow Chemical Co.. McIntire said his invention of ... The six stroke engine, the black box recorder (airplane), the pacemaker, the torpedo, differential gears, sound-proof windows, the periscope rifle, the superefficient solar cell and more are all Australian inventions.
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inventors.about.com/library/blexpertarchives4.htm
inventors.about.com/library/blexpertarchives4.htm
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Universal Expression LLC ... The invention of the collapsible periscope for use in submarine warfare is usually credited to Simon Lake. Lake revealed his invention in 1902, and proposed calling it the omniscope or skalomniscope. Fortunately, cooler heads prevailed. The first prismatic periscope wa...
http://www.ledgersentinel.com/article.asp?a=3784
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A periscope works by using two mirrors to bounce light from one place to another. A typical periscope uses two mirrors at 45 degree angles to the direction one desires to see. The light bounces from one to the other and then out to the persons eye.
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www.madsci.org/posts/archives/may2000/959444445.Eg.r.ht...
www.madsci.org/posts/archives/may2000/959444445.Eg.r.html
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The Submarine Service’s first Captain – Roger Bacon, invented the submarine’s periscope. Sir Howard Grubb – a well-known Dublin optician, later improved it. The periscope was raised and lowered by the use of a ball and socket joint.
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www.historylearningsite.co.uk/british_submarines_1900_t...
www.historylearningsite.co.uk/british_submarines_1900_to_1918.htm
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At the start of the eclectic medical reform movement begun by Wooster Beech, M.D., in the 1820s, botanical medicines remained primitive in form and application. ... As a rule the dose was large, often distressingly nauseating, and in some cases barbarous, as judged by the standards of the majority of ... In 1835 Dr. John King,
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www.eclecticherb.com/periscop.htm
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