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Title: Three vacuum tubes of the "H" form containing helium, argon [Go to resource]
Description: Three vacuum tubes of the "H" form containing helium, argon and hydrogen, in leather case License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Temporal: 1906 Source: Science Museum Creator: A C Cossor Limited (maker) Identifier: 1906-67 Go to resource More Like this...
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