Berthet André
Contenu
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Nom
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Berthet André
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Couverture temporelle
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mid-18th century
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Biographie
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Signed a micrometer added to a quadrant by Langlois.1 Subsequently he emigrated to Portugal where a mechanical equinoctial dial by him survives.2 A second such dial, developed from the form of precision horizontal dial devised by Julien le Roy in the early 18th century is dated from Lisbon in 1774.3 Given this exploitation of the Le Roy model, it seems likely that André Berthet is to be identified with the Berthet 'horloger à Dijon', who in 1758 signed a version of Le Roy's dial made in pewter.4 The previous year Berthet had made a universal meridian also in pewter which included an equation curve.5
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Notes biographiques
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1 Observatoire de Paris, Daumas 345.
2 Museu da Marinha, Lisbon. Information from Antonio dos Reis.
3 Ex Time Museum, Rockford (Ill), see Sotheby's 30. 10. 2002 lot 31.
4 Tesseract 95 N° 22. If it is not the same instrument then he made another a similar dial in the same year. See Gasser 203.
5 Ibid.
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Adresse ; enseigne ; période ; source
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PLace de la Ste Chapelle Dijon Tardy
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Identifiant
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1071
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ark:/18469/1sc84