Electric thermometer by Riess - Instrument's card

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Electric thermometer by Riess

Dating

1861 - 1862

This device was invented in 1837-1838 by P. T. Riess (1805-1885) to show and to measure the heat effects of the electric sparks and those also associated with the passage of the electric current in a wire (Joule effect). The heat produced is transferred to the air closed into the glassy flask. The air in expanding itself moves down the coloured liquid within the glass tube. The heat ammount produced depends on the characteristics of the wire inside the flask (material, section) and it can be proved that it is proportional to the square of the quantity of electricity that flows through the conductor. In reality not all the energy is transformed into heat and for this reason the experimental errors are high.

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Electric thermometer by Riess

Cataloghi	Nº	Voce
Inv. 2016	502	Electric thermometer by Riess Provisional numbering!
Inv. 1925a	92	Termometro elettrico di Riess
Inv. 1870	138	Termometro elettrico di Riess
Programmi	74	Termometro elettrico di Riess

Section

Electrodynamics

Window

Conditions

Complete

Not working

Damaged

Large	56.0 cm (22 in)
Width	15.0 cm (5.9 in)
Height	19.0 cm (7.5 in)

Materials

Sources

Cantoni G., Lezioni di fisica, Francesco Vallardi, Milano, 1875, pag. 60, fig. 1
Galileo Officine, Apparecchi per l'insegnamento della fisica, Officine Galileo, Firenze, 1929, pag. 173, fig. 5414
Joubert J., Traité Élémentaire d'electricité, G. Masson Éditeur, Paris, 1889, pag. 66, fig. 44
Magrini R., Apparecchi per l'insegnamento della fisica, Officine Galileo, Firenze, 1940, pag. 254, fig. N1058
Martelli V., Apparecchi per l'insegnamento della fisica, Soc. Italiana Apparecchi scientifici, Milano, 1956, pag. 23, fig. 544
Murani O., Trattato elementare di fisica compilato ad uso dei licei e degli istituti tecnici, Heopli, Milano, 1906, Vol. 2, pag. 329, fig. 287
Premoli P., Nuovo dizionario illustrato di elettricit&agreve; e magnetismo, Soc. Editrice Sonzogno, Milano, 1904, Vol. 2, pag. 598, fig. 1893
Ròiti A., Elementi di fisica, Le Monnier, Firenze, 1908, Vol. 2, pag. 135, fig. 80
Resti E., Catalogo generale di apparecchi per l'insegnamento della fisica, Ditta Emilio Resti di Franco Brambilla, Pubblicazi, Milano, 1930, pag. 72, fig. 368
Tarquini A., Apparecchi di fisica, Antonio Tarquini, Roma, 1928, pag. 82, fig. 30029

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.