Title
Thatcher's Rule
Catalog Number
B29.77
Type
Physical object
Description
A large cylindrical slide rule with a wooden box.
Date
ca. 1920
Manufacturer
Keuffel & Esser Company
Identifying Numbers
| Model number |
4012 (on label inside top of box) |
| Serial number |
5106 (on label inside top of box) |
Dimensions
in box: 6.5 x 24 x 6 1/2 in
Category
Pre-computer/slide rule
Subject
Hand calculation; Slide rule; Analog; Oughtred, William
Collection Title
Gwen Bell artifact and book collection
Series Title
Pre-computing artifacts
Credit
Gift of Gwen and C. Gordon Bell
