Category: Sphygmograph
Estimated Date: 1879
Name: Ponds Improved Sphygmograph
Manufacturer: Ponds Sphygmograph Co.
Description: Box 9“x6“x 2.75” contains device plus second box 6“x3“x2” 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..
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