PERSONNE, GILLES |
France, 1602-75, OIM PHIM |
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mathematician; designed an equal-arm balance; worked on developing a vacuum; put telescopes on surveying and navigating instruments, c.1667; "Gilles Personne de Roberval." |
Roberval. |
Middleton 2; G.L'E. Turner 24; A.J. Turner 10. |
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