Category: Sphygmograph
Estimated Date: 1879
Name: Ponds Improved Sphygmograph
Manufacturer: Ponds Sphygmograph Co.

Description: Box 9“x 6“x 2.75” contains device plus second box 6“x 3“x 2” for works. Stands 8” adjustable with base to lay wrist in on supports, sphygmograph adjusts downward to create pressure and a smoked paper recording is made by a clockwork mounted at the top. Scale records pressure. Box also contains smoked papers and a roller..

Reference 1: 111

Sphygmograph, Marey
Sphygmograph, Dudgeons
Ponds Improved Sphygmograph
Sphygmograph, Richardsons