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

Description: Box 9×6×2.75 contains device plus second box 6×3×2 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 paper and roller.

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