


Light bulb
1851-1900

Battery operated ophthalmoscope in a case
1920-1950

"May" improved ophthlamoscope in case
1920-1950

Night light of soft plastic
1938-1950

Electrical endoscope
1920-1940

Electrical discharge tube
1831-1870

Hexagonal green pearlised celluloid lamp with shade
1910-1940

Electrical transillumination lamp
1919-1930
Four thyratron valves
1851-1900
Electrostatic machine
1880-1910
Bedside lamp in the form of a microscope
1910-1950