2 VOLUMES BY BION, L'USAGE DE ASTROLABES, 1702 [AND] TRAITÉ DE LA CONSTRUCTION, 1752

i. L'usage de astrolabes, tant universels que particuliers. Paris: Chez Laurent d'Houry & Jean Boudot, 1702, FIRST EDITION, 12mo, [10], 242, [2]pp., 9 folding engraved plates, leaf of contents/privilege at end, contemporary calf gilt, speckled edges, (bought from The Antiquarian Scientist, Acton, MA, 1990), [T&W B163], minor dampstaining and spotting, binding repairedii. Traité de la construction et des principaux usages des instrumens de mathematique. Paris: C.A. Jombert & Nion fils., 1752, 4to, [8], 448, [12]pp., engraved frontispiece, portrait and 37 folding plates, 2 leaves of privilege/errata at end, contemporary mottled calf, red edges, "Maire d'Hurecour Canonicus Bisuntinus" (Héricourt, Besançon), signature on title, [T&W B158; Instruments in print 13], minor browning, binding slightly worn with minor loss to spine ends

Condition is described in the main body of the catalogue, where appropriate.
"In response to your inquiry, we are pleased to provide you with a general report of the condition of the property described above. Since we are not professional conservators or restorers, we urge you to consult with a restorer or conservator of your choice who will be better able to provide a detailed, professional report. Prospective buyers should inspect each lot to satisfy themselves as to condition and must understand that any statement made by Sotheby's is merely a subjective, qualified opinion. Prospective buyers should also refer to any Important Notices regarding this sale, which are printed in the Sale Catalogue.
NOTWITHSTANDING THIS REPORT OR ANY DISCUSSIONS CONCERNING A LOT, ALL LOTS ARE OFFERED AND SOLD AS IS" IN ACCORDANCE WITH THE CONDITIONS OF BUSINESS PRINTED IN THE SALE CATALOGUE."

Fourth edition of Bion’s Traité, published by his son with a revised final chapter and addition of a portrait by Nicolas Larmessin.