science · 24 January 1879 · 145 years ago
death
Died 24 Jan 1879 at age 63 (born 26 May 1815).
German glassblower for whom the Geissler (mercury) vacuum pump and the Geissler tube are named. With the unprecedented (1/100 mm of mercury) low vacuum he produced in sealed glass tubes, he made available to early physicists a valuable tool to study the effect of electricity on the remaining traces of gases therein. These produced more detailed studies of the structure of matter.
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