MAJOR (J.-F.). *A Summary of the Sphere*. Followed by a desc - Lot 161

MAJOR (J.-F.). *A Summary of the Sphere*. Followed by a description of his *Moving Sphere*. Paris: Brunot-Labe, Lenormant, Delaunay, 1813. 8vo, paperback. First edition, illustrated with 5 fold-out plates. The author, principal of the college in Bar-sur-Ornain (the former name of Bar-le-Duc in the Meuse department), the town where the work was printed, is the inventor of a “moving sphere” which he offers for sale by subscription: The accessories [sic], the rings, and the base will be crafted with the utmost care: Subscribers will receive a copy of the summary of the Sphere, followed by a description of the machine, which Mr. Delambre was kind enough to review. [...] This moving sphere is more than one and a half meters in diameter. The description of his machine appears on pp. 37–55.

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