"Automatic calculator", a circular logarithmic sli

"Automatic calculator", a circular logarithmic slide rule, scale about 10" long, made of thin card

Details

Category:
Mathematics
Object Number:
1905-117
Materials:
card, paper (fibre product), wood (unidentified)
Measurements:
Lying flat: 10 mm x 117 mm x 147 mm, 0.026 kg
type:
circular slide rule
credit:
Major-General H.P. Babbage
status:
Permanent collection

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