Urinometer for testing diabetes
1830-1920
Urinometer, mercury and glass
1830-1900
Urinometer, mercury in glass
1830-1900
Urinometer in leatherette covered cylindrical case
1830-1920
Clinical Fahrenheit thermometer
1801-1920
Clinical Fahrenheit thermometer
1801-1920
Self registering clinical centigrade thermometer
1801-1910
Self registering clinical centigrade thermometer
1861-1920
Fahrenheit, clinical thermometer
1801-1920
Clinical Fahrenheit thermometer
1870-1901
Urinometer with measuring cylinder in leather covered cylindrical case
1830-1900
Urinometer with measuring cylinder
1830-1900
Urinometer with measuring cylinder in leather covered cylindrical case
1830-1900
Urinometer, mercury in glass
1851-1920
Urinometer, glass and mercury
1830-1870
Fahrenheit thermometer
1830-1900
Fahrenheit clinical thermometer
1801-1900
Urinometer, glass and mercury
Urinometer, glass and mercury
1830-1920
Urinometer, mercury in glass
1850-1930
Clinical centigrade thermometer
1801-1920
Clinical centigrade thermometer
1801-1920
Clinical centigrade thermometer
1801-1920
Urinometer and measuring cylinder
1830-1920
Fahrenheit clinical thermometer in red leather case
1801-1901
Mercury in glass urinometer
1830-1920