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	Heinrich Geissler
	(Johann Heinrich Wilhelm Geissler)
	Igelshieb 26.May.1814-Bonn 24.January.1879

	Biographical notes



	The son of a glass blower, Heinrich Geissler began its activities in the Duchy of Saxony-Werningen and practiced in many German universities, among them the University of Monaco. He entered as a mechanic at the University of Bonn (1852), establishing a laboratory for the manufacture of physics and chemistry aimed at WHT and E. Meyer Pflüger. Pflüger. The university grants him the title of doctor honoris causa in 1868. Very passionate about your work, very clever in manual work, has many links with researchers from the laboratory and is sought for the preparation of various scientific instruments. Per J. To J. Plücker, a Bonn, Geissler fabbrica i primi termometri di precisione a capillare di vetro, e, nel 1863, costruisce, sul principio del termometro a minimo di Casella, termometri a massimo. J.-P. Plücker, in Bonn, the first factory Geissler thermometers precision glass capillary, and, in 1863, built on the principle of a minimum thermometer Casella, thermometers maximum. In 1858, Plücker appeals to his dexterity for construction series of rarefied gas pipes, which gave his name 'Geissler tubes', although the invention is J.-P. Gassiot (amico di Faraday) . Gassiot (friend of Faraday). Since 1855, Geissler builds a vacuum pump mercury for the production of empty very driven (1 / 100 millimeters of mercury). They must also recognition for welding in the glass-metal tubes that Plücker Geissler used for the study of electrical discharges in the rarefied gases. Towards 1860, Geissler manages to convert phosphorus white phosphorus red "with electricity", ie electrical charge; what has won the medal of merit in the arts and sciences, on the occasion of International Vienna.