Logynon pregnancy calculator

Made:
1984 in Burgess Hill
Logynon pregnancy calculator, circular volvelle ready reckoner

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Logynon pregnancy calculator, circular volvelle ready reckoner
Science Museum Group
© The Board of Trustees of the Science Museum

Logynon pregnancy calculator, circular volvelle ready reckoner, mounted on plastic presentation box dated February 1984

Details

Category:
Mathematics
Object Number:
1989-820
Materials:
plastic
Measurements:
overall: 30 x 115 x 112 mm
type:
ready reckoner (pregnancy)
credit:
University College Health Centre