Double barrelled air pump
1801-1900
Bunsen absorptiometer
Urinometer, glass and mercury
1830-1870
Glass measuring cylinder, 10ml, in case
Glass cylinder; brass base; milled screw
1800-1899
Simple viewer, English, mid 19th century
1830-1870
Simple viewer, English, mid 19th century
1840-1860
Wire brush electrode in glass tube
1890-1905
Broken drainage tube in glass cylinder
Urinometer, mercury in glass
1850-1930
Glass cylinder, ground on outside
1800-1899
Simple viewer in case, English, early 19th century
1800-1825
Gas cylinder
1801-1900
Electrostatic machine
1850-1900
Electrostatic machine
1801-1850
Glycerine syringe
1920-1940