Science Birthdays, January 29

1/29/1773        Mohs Friedrich            mineralogist     devised the Mohs scale in 1822. died in 1839 at age 66.

1/29/1838        Morley Edward           chemist            He worked on the relative weights of hydrogen and oxygen in the 1870s and collaborated with Michelson on the famous Michelson-Morley experiment. he died in 1923 at age 85.

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