Humidity evaluator

Humidity evaluator, in form of circular slide rule

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Humidity evaluator, in form of circular slide rule
Science Museum Group
© The Board of Trustees of the Science Museum

Humidity evaluator, in form of circular slide rule, marked USWB [United States Weather Board] No 500. Made by VIZ Molded INSULATION COMPANY, marked MIC 1063-65B. Date 1950-1970

Details

Category:
Meteorology
Object Number:
1995-911
Materials:
plastic
Measurements:
overall: 28 cm
type:
humidity evaluator
credit:
Meteorological Office, Berkshire