RICHER, JEAN-FRANCOIS |
France, 1743-1820, MIM NIM SIM |
Tellurium = BMR; Graphometers = P.C. (1987) (1807) (2), A-P 3/15/76 (1807), D.(1985), Versailles 11/20/83, Soth. 4/29/77; Magnetic Compass, 1807 = Picard, Drouot Richelieu, 12/11/91; Transit Circles = P.C., Ineichen 10/20/75; Sextant = Historical Society of Delaware; Y-Level = Franklin Institute Philadelphia, Pa.; Marine Compass = VNN; Terrestrial Globe = P.C.; Slide Rules = P.C.(1987), D.(1993). |
Jean-François Richer; all his instruments are signed simply "Richer à Paris"; scale on Mossy barometer of 1789 is marked "Divisé par Richer"; the tellurium was marked "invented by Abbé Grenet." |
L' Hermite, Paris. |
Daumas 1; USNM; Moskowitz 103; Coffeen 10 and 43; Darius 4; RSW. |
|
|
|
|
|
|