AN AMSLER PROPORTIONAL POLAR PLANIMETER SERIAL NO. 61937, LA...

by Dore & Rees Auctions
1/5

Estimate

£60 - £100

Fees

AN AMSLER PROPORTIONAL POLAR PLANIMETER SERIAL NO. 61937, LATE 19TH CENTURY, CASED.
30.5 cms long (Case)                                         

NOTE: Used to calculate the area of an irregular shape and invented by Jakob Amsler-Laffon in 1854.

Closed
Auction Date:
21st Sep 22 at 10:30am BST

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Sale Dates:
Wed 21st Sep 2022 10:30am BST (Lots 1 to 619)