February 01, 2013
by Sean Ruck, Contributing Editor
Each month we visit Dr. Blaufox’s Museum of Historical Medical Artifacts to take a look back at the medical equipment that cleared the way for what patients encounter in doctors’ offices and operating rooms of today. Some equipment may be recognizable, while other inventions featured here have since become obsolete or have had their usefulness discredited.

The picture and description appear courtesy of Dr. M. Donald Blaufox, M.D., Ph.D, from his website:

Category: Quantitation
Estimated Date: 1900
Name: Kymograph
Manufacturer: Unknown
Description: 7“h 6“drum on very heavy cast iron stand. A 3.5“x 2“x 1.25” brass box contains the gear mechanism. There is a winding key and a fly wheel. Drum turns on gear at bottom connected to gear on box bottom with a replacement o ring. On one leg is a rod with adjustable connectors and two air actuated diaphragms with original needles to attach to physiologic recording device. Additional recording devices of the type shown here could be attached to broaden its range of measurements.