Dumb-bell vacuum tube with spiral tube inside

Made:: Great Britain and Unattributed

Dumb-bell vacuum tube with spiral tube inside
Science Museum Group
© The Board of Trustees of the Science Museum

Dumb-bell vacuum tube with spiral tube inside, supplied by Medical Supply Association, British, 1904

Details

Category:: Therapeutics

Collection:: Sir Henry Wellcome's Museum Collection

Object Number:: A602661

Materials:: glass, electrodes, metal and contacts, brass

Measurements:: length 250 mm
tube: diameter 25 mm
bells: diameter 37 mm

type:: electrodes

credit:: Bruce, A.N.

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