Crookes tube Nº 1044 - Instrument's card

	Virtual Museum - Traversi Museum
	Instrument's card

Instrument Nº - Query criteria NOTICE

Print the card

Crookes tube Nº 1044

Dating

7 April 1961

Discharge tube whose working way is different depending on the level of rarefaction of the gas inside it. For pressures around 2 mmHg a number of distinct discharges (one for each anode - three - present in the device) depart from the cathode. If the vacuum level is much higher, a single beam rises from the cathode with a straight path. The real behaviour cannot be verified because the terminals of the electrodes are damaged.

Web page

Crookes tube Nº 1044

Cataloghi	Nº	Voce
Inv. 2016	499	Crookes tube Nº 1044 Provisional numbering!
Inv. 1870	1044	Tubo di Crookes a bassa rarefazione

Section

Electrostatics

Window

Conditions

Complete

Working NC

Intact

Large	20.0 cm (7.9 in)
Width	14.0 cm (5.5 in)
Height	43.0 cm (16.9 in)

Materials

Sources

Bernardi G., Apparecchi di fisica, III Edizione, Ditta Prof. Gaetano Bernardi, Tranto, 1931, pag. 66, fig. 7440
Galileo Officine, Apparecchi per l'insegnamento della fisica, Officine Galileo, Firenze, 1929, pag. 242, fig. 5573
Magrini R., Apparecchi per l'insegnamento della fisica, Officine Galileo, Firenze, 1940, pag. 326, fig. N1230
Martelli V., Apparecchi per l'insegnamento della fisica, Soc. Italiana Apparecchi scientifici, Milano, 1956, pag. 41, fig. 788
Premoli P., Nuovo dizionario illustrato di elettricit&agreve; e magnetismo, Soc. Editrice Sonzogno, Milano, 1904, Vol. 2, pag. 169, fig. 1367
Resti E., Catalogo generale di apparecchi per l'insegnamento della fisica, Ditta Emilio Resti di Franco Brambilla, Pubblicazi, Milano, 1930, pag. 103, fig. 496

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.