Patent protractor in form of set square, patented

Made:
1885-1895

Patent protractor in form of set square, patented by Henry Marle in 1885 and "approved by the Science & Art Dept. South Kensington"

Details

Category:
Mathematics
Object Number:
1987-604
type:
drawing instruments
credit:
Delehar, P.
status:
Permanent collection

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