Diapason 870 Hz - Instrument's card

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Diapason 870 Hz

Dating

June 1888

Maker

Sécretan

This tool is a tuning fork mounted on a wooden resounance box. It gives the A at 870 vibrations per second and it is signed by the maker.

Web page

Diapason 870 Hz

Cataloghi	Nº	Voce
Inv. 2016	628	Diapason 870 Hz Provisional numbering!
Inv. 1925a	334	La normale di 780 vibrazioni
Inv. 1870	571	La normale di 780 vibrazioni

Section

Acoustics

Window

Conditions

Complete

Working

Damaged

Large	19.0 cm (7.5 in)
Width	9.0 cm (3.5 in)
Height	23.0 cm (9.1 in)

Materials

Sources

Bernardi G., Apparecchi di fisica, III Edizione, Ditta Prof. Gaetano Bernardi, Tranto, 1931, pag. 25, fig. 5189
Daguin P. A., Cours de physique élémentaire avec les applications a la météorologie , E. Privat, Toulouse, 1863, pag. 214, fig. 245
Felice M., Elementi di fisica, Ditta G. B. Paravia e Comp., Torino, 1887/90, Vol. 3, pag. 84, fig. 23
Galileo Officine, Apparecchi per l'insegnamento della fisica, Officine Galileo, Firenze, 1929, pag. 93, fig. 5204
Magrini R., Apparecchi per l'insegnamento della fisica, Officine Galileo, Firenze, 1940, pag. 156, fig. H754
Privat Deschanel A., Trattato elementare di fisica, Fratelli Dumolard, Milano, 1890, pag. 721, fig. 646
Tarquini A., Apparecchi di fisica, Antonio Tarquini, Roma, 1928, pag. 60, fig. 361

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.