CHM Revolution

Date Introduced

1900 ca.

Photographer

Richards, Mark

Dimensions

1/2 x 2 3/4 x 3 1/2 in.

Manufacturer

R. Waddington

Credit Line

Loan of Gwen and Gordon Bell

Copyright Owner

© Mark Richards

Location

United Kingdom

Keywords

Oughtred, William; Analog; Slide rule; Hand calculation

Object ID

XB123.80

The circular scales moved independently and there was no cursor.