Dudgeon sphygmograph by Maw
1870-1901
Urethroscope and accessories, London, England, 1919-1930
1919-1930
Granville type sphygmograph, London, England, 1885-1900
1885-1900
Early type of Richardson sphygmograph
circa 1883
Dudgeon sphygmograph by Mayer and Meltzer
Pachon sphygmomanometer by G. Boulitte
Dudgeon sphygmograph by Krohne and Sesemann
1870-1900