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Distancemeter, by Ponthus & Therrode, Paris, Early 20th Century

Inventory Number 62949

Acknowledgement: © History of Science Museum, University of Oxford, inv.62949

Item type
Object
Provenance
Not ascertained
Primary inscriptions
"A. HURLIMANN / PONTHUS & THERRODE / SUCCESSEURS / PARIS" on optical tube.
Physical material
Brass
?ivorine and leather
Dimensions
Height: 177mm Width: 173mm Depth: 70mm
Inventory No
62949

Description

Instrument may be a prototype rather than a production device. Magnifying optical tube (from a pair of binoculars?) with ?ivorine scale drum rotating against scale and with manuscript correction table in French and English.

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