CHM Revolution

Date Introduced

1869 ca.

Photographer

Richards, Mark

Dimensions

overall: 14 1/2 in x 19 in x 19 in.

Manufacturer

Jos. W. Fowle

Copyright Owner

© Mark Richards

Location

United States

Keywords

Oughtred, William; Analog; Slide rule; Hand calculation

Object ID

X1097.92

Designed by “The Father of Life Insurance” to make accurate insurance calculations.