Panel

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Image: 56713.jpg | Domenico da Chivasso. ''Pratica Geometriae'', ms, Firenze, 1346, Biblioteca Medicea Laurenziana, San Marco 215, c.127r.<br />
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|autore_scheda= Filippo Camerota
|autore_scheda= Filippo Camerota

Current revision as of 08:38, 10 September 2010

Has no specific name.

Contents

Inventor

Domenico da Chivasso


Historic Period

1346


Description

Instrument described by Domenico da Chivasso for measuring the distance between two towers or two cities. On the board, the directions of the visual rays encompassing the two towers are traced (by applying the eye to the edge of the board) and on these lines the respective distances, measured with other instruments, between the observer and the towers, are entered in scale. The line joining the ends of the segments measured shows the distance between the towers in scale. The triangle drawn on the boards, in fact, is a first form of topographical triangulation, and its vertices represent, in scale, a zenithal projection of the mutual positions of the observer and the two towers or cities.


Bibliographical Resources

Domenico da Chivasso. Practica geometriae, Firenza, Biblioteca Mediceo Laurenziana, San Marco 215, cc. 124v-144r, I, 1.



Images


Author of the entry: Filippo Camerota

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