Title
Mercury vacuum pump being used to evacuate light bulbs on commercial scale c1883
Caption
Mercury vacuum pump being used to evacuate (exhaust) light bulbs on commercial scale c1883. Pump here is Geissler's as modified by Topler and was type used by the Swan Company. From R. Wormell "Electricity in the Service of Man" London 1896. Engraving
Date
19th century
Credit line
Photo12/Ann Ronan Picture Library
Reference
ARP07104_460001299
License type
Rights managed
Available size
30,8Mb (4,8Mb) / 10,1in x 11,8in / 3038 x 3543 (300dpi)