Lefevre, Jean
Contenu
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Nom
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Lefevre, Jean
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Couverture temporelle
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? Late 17th/early 18th century
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Biographie
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A general mathematical instrument-maker, member of the Founders' Corporation who in is mentioned by Bordelon as the maker of a self-orienting universal equinoctial dial which could be used to draw the lines for. other dials (1). In 1700 published a pair of celestial and terrestrial planispheres dedicated to the Abbé Bignon, supervisor of the Académie des Sciences (2). In 1702 he supplied a 3ft quadrant to the Marseilles Observatory for the use of Laval (3). In 1705 he invented a new form of micrometer in which a thread moved in front of a plaque inscribed with parallel lines. One such was fitted to Laval's 7 1/2ft telescope (4). He, or his son Etienne Jean Lefèvre (d. 1753), was juré of his corporation 1712-14 and 1724-26.4
Instruments signed Lefèvre (Le Febvre; le Febure)
Silver Butterfield-type dial Bonhams' 21.4. 10 Lot 135.
Octagonal, string-gnomon pocket dial Christie's , illustrated in Turner G Gli strumenti,451.
Horizontal dial, PC AJT).
Brass Butterfield-type (Delalande 158).
Vertical plate-dial (Delalande 366)
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Notes biographiques
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1. Bordelon ii, 57.
2. Warner 158. Examples CNAM, inv. 774 (terrestrial), 775 (celestial).
3. Dainville (Foyers), 4. Debarbabt & Dumont 20; Homet 139.
4. Gallon iiii 103-5; Debarbat & Dumont 20.
5. Augarde 62 note 76. Daumas 106, citing a phantom reference in Huyygens' correpondence identifies him with the astronomer-academician Jean Lefebvre (c. 1650-1706) who was excluded from the Académie in 1702 following a dispute with the La Hires, father and son (For this affair see Condorcet i 184-6. Lalande 341-4). There seems however to be no evidence for this assertion which McKeon (DSB viii, 131-2) has rightly questioned.
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1 Lalande 338. Warner 158.
2 Lalande 345. Warner 158.
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Bibliographie
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Description et usage du planisphère nouvellement mis en pratique par…, ingénieur pour les instrumens de mathématiques, Paris 1700.1
Another issue 1702.2
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Adresse ; enseigne ; période ; source
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Quai de l'Horloge (dit des Morfondus), Paris 'Aux Deux Globes' 1699 (Bordelon ii, 57).
Quai de l'Horloge Paris Aux Deux Globes Lalande 338, 345
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Identifiant
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65
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ark:/18469/1qgsp