CHM Revolution

Photographer

Richards, Mark

Dimensions

overall: 1.5 x 11.25 x 2 in

Credit Line

Courtesy of Gordon and Gwen Bell

Copyright Owner

© Mark Richards

Keywords

Electronics; Digital; Planimeter

Object ID

B252.82

Planimeters became commercially available in the second half of the 1800s. The most popular of several styles was the polar planimeter, in which the linkage moves relative to a fixed point. Modern planimeters often use digital electronics.