Objective micrometer - Instrument's card

	Virtual Museum - Traversi Museum
	Instrument's card

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Objective micrometer

Dating

29 June 1915

Maker

Sécretan

Web page

Objective micrometer

Cataloghi	Nº	Voce
Inv. 2016	782	Objective micrometer Provisional numbering!
Inv. 1925a	482	Micrometro obiettivo
Inv. 1870	797	Micrometro obbiettivo

Section

Optics

Window

Non esposto

Conditions

Complete

Working

Intact

Large	8.0 cm (3.1 in)
Width	1.0 cm (0.4 in)
Height	3.0 cm (1.2 in)

Materials

Sources

Besso B., Le grandi invenzioni antiche e moderne, Fratelli Treves, Milano, 1875, Vol. 1, pag. 322, fig. 332
Gelcich G., Ottica, Hoepli, Milano, 1895, pag. 325, fig. 125
Milani G., Corso elementare di fisica e meteorologia, Editori della biblioteca utile, Milano, 1869, Vol. 7, pag. 234, fig. 127

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.