| || |Since
1855, Geissler builds a vacuum pump mercury for the production of empty
very driven (1 / 100 millimeters of mercury). In 1858, Plücker
appeals to his dexterity for the construction series of rarefied gas
pipes, which gave its name
'Geissler tubes'. Gassiot (friend of
Faraday) presents a statement in 1858 that certifies testing with
vacuum tubes in the laboratories of the Royal Society.