Frost point hygrometer, made by Casella, London, w

Made:
1951 in London
maker:
C F Casella and Company Limited

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Frost point hygrometer, made by Casella, London, with balanced bridge thermometer indicators, marked 89/91, BBTI MkIIB, marked 828/54, Met ref 1525

Details

Category:
Meteorology
Object Number:
1995-916
Materials:
glass, metal and wood substitute
type:
hygrometer
credit:
Meteorological Office, Berkshire