FOUCALT, JEAN BERNARD LEON |
France, 1819-68, OIM PHIM |
Philosophical Instrument = POB; Telescope = Observatoire de Marseilles (2). |
Jean Bernard Léon Foucalt; designed microscopes for daguerreotypes; designed pendulum to show motion of the earth; invented a gyroscope in 1852. |
Paris. |
Nachet; Trois Siècles; G.L'E. Turner 24; Maynent. |
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