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Robert Hooke's rain gauge. Engraving of the rain gauge used by Robert Hooke at Gresham College in 1695. The collected rain water was measured every Monday from August 1695 to August 1696. Robert Hooke (1635-1703) went to Oxford and studied science under Boyle. He was an ingenious & expert mechanic and experimenter. As well as designing various hydrographic instruments, he made an improved air pump for Boyle, he devised a compound microscope, & an improved telescope and barometer. He also invented a revolving drum recorder for temperature and pressure, and a universal joint. He discovered Hooke's Law of elasticity, and also developed theories on light, combustion & gravity.
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