- La geometrie francoise ou la Pratique aisee pour apprendre sans maistre l'arpentage... mesures
by Jean de Beaulieu
Paris, Charles de Sercy; 1676.
French geometry, or easy practice for learning without a master the survey of accessible & inaccessible figures, measurements & survey of fortifications, & all kinds of buildings for those who have no knowledge of mathematics, with the arithmetic key for its operations. The squaring of the circle or the practice & reduction of circles, segments, ellipses, parabolas, hyperbolas & conical & cylindrical scission, in their perfect square, their applications to the measurement of curves-lines, civil, naval & military architectures in favor of scholars .

First edition of this rare treatise on geometry, illustrated with an engraved title, copper-engraved and wood-engraved bands and 4 plates inset on copper, two of which are included in the pagination: the first 3 illustrate geometry, the last concerns the Squaring of the circle.
Some old marginal annotations.
title pages with the handwritten ex-libris of the original owner (a surveyor of the control of Waters and Forest 1761)
Traces of handling, light waterstaining on several leaves.
The last leaf with hole in the margin, restored.
Fairly good condition.
Modern half-calf binding in perfect condition.
3 parts in 1 volume
Size 5 by 7 1/3'
[12] lvs, 103 , [3] pp., 24 pp., [6] , 38 (ie.40) pp.
Page error. :p. 101 numbered 110 (1st part.); p.7 numbered 17 (2nd part.); 2 sequences 12-13 (2nd part.).
The third part is bound before the second.
Complete.
Text in French

Jean de Beaulieu was an engineer, geographer to the king and sworn surveyor in the department of La Rochelle.
It deals with planimetry (measurements of surveying), longimetry (lengths and widths of objects in surveying), stereometry (measurement of solid bodies), altimetry (measurement of volumes). Here the second part is entitled: "The key to arithmetic, or the science of numbers to solve all the questions proposed, for the operations of French Geometry" signed A.M.D.G. The third is a treatise on squaring the circle "fortunately discovered by the author of the present treatise".




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