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Details and Image
Type
Model No.
Maker
Country
Construction
Material
Date
Scale Length
Area of Use
Circular and Spiral Slide Rules
FELSENTHAL / PSYCHROMETRIC CALCULATOR
Felsenthal Instrument Co.
USA
Plastic
1960s
Ø 28 cm
Weather
Notes:
Retailed by the US Department of Commerce - Weather Bureau. Using readings from a sling psychrometer this slide rule calculates the relative humidity and dew point at both high and low temperatures.
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