A 20″ Mannheim type slide rule, made of celluloid framed on a mahogany surface. The glass cursor is missing. This slide rule has scales only the top surface and includes metric and imperial rulers on either side. Comes in a black cardboard case. Scales: Front: A, B, C, D. Also has rulers on either side. Back: Conversion tables, equivalents and settings.
Accession Number: 2010.lej.12
Primary Materials: Celluloid, Mahogany
Old inventory number = 12.
Markings: “185432; <4051>, Pat, June 5, 1900”.
Dimensions (cm): Height = 1.4, Width = 3, Length = 52.2
Function: For facilitating calculations.
Poor: The glass slide is missing. The slide does not move. Part of the mahogany top surface has split. The bottom of the cardboard case is missing.
Manufacturer: Keuffel and Esser Co., New York
Date of Manufacture: c. 1901-1937
Additional Information and References:
- Donated to UTSIC