Humidity recorder by Jules Richard Instruments(of which the drum does not rotate) with key and spare charts

Made:
1970
maker:
Jules Richard Instruments

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Humidity recorder by Jules Richard Instruments(of which the drum does not rotate) with key and spare charts, 1970s.

Details

Category:
Environmental Science & Technology
Object Number:
1997-1808
Materials:
metal, paper and plastic
type:
humidity recorder
credit:
Transport Research Laboratories Limited