Tubi di Geisler with fluorescence glass - Instrument's card

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Tubi di Geisler with fluorescence glass

Dating

8 March 1940

The Geissler tubes were discharge tubes with inside various gases at reduced pressure. These tubes were created in 1857 by Johann Heinrich Geissler (1814-1876) to study the electric conduction of gases. These devices can be considered an evolution of the so-called electric eggs. With the advance in the art of produce vacuum then the Crooks tubes or cathode ray tubes were realized, a milestone in the path that led to the identification of the negative charge unit, the electron.

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Tubi di Geisler with fluorescence glass

Cataloghi	Nº	Voce
Inv. 2016	495	Tubi di Geisler with fluorescence glass Provisional numbering!
Inv. 1870	958	Tubi di Geissler di vetro fluorescente

Section

Electrostatics

Window

Conditions

Complete

Working NC

Intact

Large	5.0 cm (2 in)
Width	1.0 cm (0.4 in)
Height	22.0 cm (8.7 in)

Materials

Sources

Felice M., Elementi di fisica, Ditta G. B. Paravia e Comp., Torino, 1887/90, Vol. 2, pag. 284, fig. 115
Galileo Officine, Apparecchi per l'insegnamento della fisica, Officine Galileo, Firenze, 1929, pag. 241, fig. 5565
Martelli V., Apparecchi per l'insegnamento della fisica, Soc. Italiana Apparecchi scientifici, Milano, 1956, pag. 40, fig. 777/2
Premoli P., Nuovo dizionario illustrato di elettricit&agreve; e magnetismo, Soc. Editrice Sonzogno, Milano, 1904, Vol. 1, pag. 514, fig. 736
Tarquini A., Apparecchi di fisica, Antonio Tarquini, Roma, 1928, pag. 148, fig. 30928

The additional indications which integrate the items of the conservation's state have the following meaning: (?) = maybe complete; M = maintenance; P = partial; R = restored; D = used for teaching; NC = not checked; X = impossible to verify.

In order to avoid that instruments' cards without the english description text of the device be directly selected, I added a special filter with which only the complete cards are shown in the menu. Anyhow all the partial english instruments' cards (with instrument's dating, dimensions, state of conservation...) can always be seen even if they haven't the english description text. To read this uncomplete cards is sufficient to click, for example, on an instrument's picture or on the word "View" of the table column called "Card" every time they appear in the other pages of this database.