Light bulb
1851-1900
Ultraviolet lamp for domestic actinotherapy
Electrical discharge tube
1831-1870
"May" improved ophthlamoscope in case
1920-1950
Hexagonal green pearlised celluloid lamp with shade
1910-1940
Battery operated ophthalmoscope in a case
1920-1950
Night light of soft plastic
1938-1950
Electrical endoscope
1920-1940
Electric lamp illumination with wooden stand
Glass bulb; brass collar; plug; tap
1761
Electrical transillumination lamp
1919-1930
Bedside lamp in the form of a microscope
1910-1950
Four thyratron valves
1851-1900
Electrostatic machine
1880-1910