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Signature	Maker	Instruments	Comments	Location	References
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.
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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