Dudgeon's Sphygmograph
This medical instrument, made in the 1880's, measured the pulse rate.....
$675.00
This medical instrument, made in the 1880′s, measured the pulse rate when strapped to the wrist. A graph of the pulse was scratched onto a paper roll pushed along by a clockwork roller. (Ido not have the paper). The condition of this instrument is good and works but the strap is worn thin. The box is in good shape and measures 3.25″ by 3″ by 2″ and the instrument in the box weighs 6.8 oz. For more pictures and any questions call or email.
