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Semicircular Plotting Protractor, English, c. 1877

Inventory Number 31139

Acknowledgement: © History of Science Museum, University of Oxford, inv.31139

Acknowledgement: © History of Science Museum, University of Oxford, inv.31139

Subject: Mathematical instruments
Item type: Object
Primary inscriptions: "Patent 802.1877. Inst. No. 142."
Physical material: brass
Object type: Protractor
Inventory No: 31139

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