![](http://www.alamy.com/thumbs/6/3BD0A407-F54A-4011-91E0-92B0DEBB748A/CW2PW4.jpg)
Mercury vapour arc tube in holder, British manufacture probably 1930s, UK
Size: 3425px × 5098px
Photo credit: © Chris Howes/Wild Places Photography / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: antique, arc, britain, british, cutout, discharge, electric, europe, european, gas, gb, glass, great, historic, kingdom, lamp, mercury, quartz, rc, sealed, tube, uk, united, vapor, vapour