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  • All fields: 22.2 x 19.2 cm
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    • Women's chemistry class, 1915

    • Chemistry; Iowa State University;
    • A chemistry class for women. A notation on the reverse reads: ""2nd Floor-East--Room now a corridor leading into PSRR (Physical Science Reading Room) on second floor of O & L Bldg. (Office & Lab Building). Class taught by Nellie Naylor."" Naylor, a...
    • Chemistry experiment, 1939

    • Chemistry; Laboratory; Iowa State University;
    • An experiment in micro chemistry, Chemistry 102, in the spring of 1939. The close up photograph shows a hand holding tweezers which in turn hold a small chemical boat as it is about to be inserted into a small electrified chamber. A voltage meter...

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