| UtteklyUtenue | Date: Sunday, 2013-06-16, 2:20 PM | Message # 1 |
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Abbas Ibn Firnas discovered an all in one way to explore make glass crystal clear. While having said that warm examples of these glasses may be regularly shaped and polished into fight clear stones: flat everywhere over the a minimum of one aspect and convex everywhere in the going to be the all the other These stones came in order to get known as reading stones. In 1021 going to be the Book of Optics was published on such basis as Alhazen. This perhaps be the earliest known monitor to do with something which can be used for magnifying that was a lot more advanced than the reading stone. This consider was translated and was the foundation about going to be the invention to do with actual glasses judging by going to be the Italians in the 1200's AD.
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