Kahl Scientific Inst. Corp., Margaret Culbertson Oceanographic Slide Rule

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Country of manufacture: USA,            Date of manufacture: ____
Diameter: 21.0 cm,      Weight: 152.6 gms
Materials: plastic
Cursors: One on front side, two on back side; clear plastic; one hairline on each cursor.
Scales: specialized
Front: Used for determinations of salinity, conversion scales for depth and temperature, and a blank semi-circular table where individual thermometer index corrections may be entered at appropriate temperatures for as many as 15 thermometers.
Back: Used for thermometer corrections and depth calculations; the outer log scale may also be used for multiplucation and division in the usual way.
Condition: C3 (Very Minimal signs of use)
Came with: Black plastic case, reprint of American Geophysical Union article (June 1955, Vol 36, No. 2) containing description and instructions.

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