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Created by 19anujm
on Mar 10, 2011
Last updated: 03/14/11 at 06:36 PM
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Anders Celisuis a Sweedish astronomer devised a standard scale for a measurement of tempreture.
it is made by christian Huygens a dutch physicist.
Evangelista Torricelli created a divice know as now mercury barometer
in 1569 Gerardus interduce a accurate map
first machanical clock by Gerbert
1300 water clock made for arab sultan