Historic scientific instruments held by the Biology Department of the Michigan Technological University School of Technology, Houghton, MI, USA.

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Collection Items

Salmoiraghi Planimeter model 236-A
Physical Description

Functional Description

HCE Rotopol polarizing unit
Physical Description Two polarizing lenses on a hexagonal shaft.  The two lenses are each in a metal ring with a hexagonal handle, and the smaller of the two fits in the larger to make a double-ended (dumbell) object. The smaller of the two lenses…

Precision Systems ”Osmette” Prescision Osmometer
Physical Description

Functional Description
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