"Ardente" hearing aid, cased, by R.H. Dent, England, 1920-1940 "Ardente" hearing aid, cased, by R.H. Dent, Englan Audiology 1920-1940
Haemoglobinometer, Gower, glass, in leather case, owned by the late Sir Gordon Hamilton Fairley, made by Hawksley and Sons Limited, 83 Wigmore Street, London, England, 1851-1900. Haemoglobinometer, Gower, glass, in leather case, Laboratory Medicine 1851-1900
Incomplete violet ray apparatus, in fitted leatherette case, three heads and a curved tube only, English, early 20th century Incomplete violet ray apparatus, in fitted leather Therapeutics 1920-1950
Pachon sphygmomanometer by G. Boulitte, 15-21 rue Bobillot, Paris, France. Pachon sphygmomanometer by G. Boulitte, 15-21 rue Clinical Diagnosis
