Planimeter
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Revision as of 10:11, 26 July 2010
Name coined by the inventor (in Latin instrumentum planimetrum) combining the Latin words planus (plane, flat) and metrum (from the Greek metron=measure).
Contents |
Inventor
Reiner Gemma Frisius
Historic Period
1533
Description
The instrumentum planimetrum described by Reiner Gemma Frisius (1533) is similar to the compass except that the circumference is divided into four 90° sectors. The position angles of the various places are measured with reference to the four cardinal points.
Bibliographical Resources
Apianus, Petrus. Cosmographicus liber Petri Apiani mathematici, iam denuo integritati restitutus per Gemmam Phrysium, item eiusdem Gemmae Phrysij libellus de locorum describendorum ratione, et de eorum distantijs inveniendis, nunquam ante hac visus. Antverpiae, Ioan. Grapheus typis cudebat, 1533.
Rojas, Sarmiento Juan de. Illustris. uiri D. Ioannis de Roias Commentariorum in astrolabium quod planisphaerium vocant: libri sex nunc primum in lucem editi: his additus est index capitum ac rerum quae toto opere continentur locupletssimus. Lutetiae, apud Vascosanum ..., 1550, V.
Bartoli, Cosimo. Del modo di misurare le distantie, le superficie, i corpi, le piante, le provincie, le prospettive, et tutte le altre cose terrene, che possono occorrere a gli uomini, secondo le vere regole d'Euclide, et de gli altri più lodati scrittori. In Venetia, per Francesco Franceschi Sanese, 1564, IV.
Bartoli, Cosimo. Del modo di misurare le distantie…(1559). Firenze, Biblioteca Medicea Laurenziana, Ms. Plut. 30.27.
Author of the entry: Filippo Camerota
