Sand timer

Sand timer, 30 seconds

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Sand timer, 30 seconds
Science Museum Group
© The Board of Trustees of the Science Museum

Sand timer, 30 seconds, for use with clinical thermometers or for taking pulse, 1920-1960

Details

Category:
Clinical Diagnosis
Object Number:
1982-185/40
Materials:
metal, glass and sand
Measurements:
overall: 90 mm 11 mm, .013 kg
type:
timers
credit:
G H Zeal Limited