Planimeter, to measure area of hides
1904
Fixed scale polar planimeter
1840-1864
Ott's universal planimeter
Polar planimeter, 1894
Sang's Platometer
1851
Planimeter (rolling type) by G. Coradi
Planimeter of Oppikofer and Ernst cone-and-disc type
1848-1852
Coradi compensation planimeter no 28348
1920
Hatchet planimeter
Wetli planimeter; engraved "Patent Von Wetli & Starke No. 103"
1858-1862