Dudgeon sphygmograph
Dudgeon sphygmograph
Electrode, set of seven
1890-1900
Granville type sphygmograph, London, England, 1885-1900
1885-1900
Clinical thermometer
Early type of Richardson sphygmograph
circa 1883
Dudgeon sphygmograph by Krohne and Sesemann
1870-1900