Career Mania 55: GyanCentral - The hub for engineering and law students - IIT-JEE, AIEEE, BITSAT, CLAT, AILET - 2012: inventions

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GyanCentral - The hub for engineering and law students - IIT-JEE, AIEEE, BITSAT, CLAT, AILET - 2012: inventions Oct 11th 2012, 06:51 GyanCentral - The hub for engineering and law students - IIT-JEE, AIEEE, BITSAT, CLAT, AILET - 2012 The source for all engineering and legal education news in India inventions Oct 11th 2012, 05:59 All about inventions: · The study of variable stars was first dealt with Friedrich Wilhelm August Argelander. · Differences in stellar and nebular spectra were caused by differences in their chemical composition was first argued by Lawrence Hugh Aller. · The concept of television was first brought by Paul nipkow in 1884, by using a rotating metal disk. · Richard E. Drew was first to discover adhesive tape. · The first ball point pen was invented by Lazlo and Georg brio. · Band – aid was first invented by Earle Dickson. · Physical educationist by profession, "James Naismith" invented the game of basketball. · The invention of safety pin took place in 1894 by "Walter Hunt." · The all time famous blue denims were first invented by Levi Strauss. · The street letter drop mailbox with a hinged door that closed to protect the mail was invented by "Philip B. Downing." You are receiving this email because you subscribed to this feed at blogtrottr.com. If you no longer wish to receive these emails, you can unsubscribe from this feed, or manage all your subscriptions

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