Clinical Fahrenheit thermometer

1801-1920

Clinical Fahrenheit thermometer

1801-1920

Fahrenheit, clinical thermometer

1801-1920

Clinical Fahrenheit thermometer

1870-1901

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

Self registering clinical centigrade thermometer

1801-1910

Self registering clinical centigrade thermometer

1861-1920

Clinical centigrade thermometer

1801-1920

Clinical centigrade thermometer

1801-1920

Clinical centigrade thermometer

1801-1920

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

Urinometer and measuring cylinder

1830-1920

Fahrenheit clinical thermometer in red leather case

1801-1901

Mercury in glass urinometer

1830-1920