2 WORKS BY PENTHER, PRAXIS GEOMETRIAE, 1755 [AND] GNOMONICA FUNDAMENTALIS & MECHANICA, 1768

i. Praxis geometriae, worinnen nicht nur alle bey dem Feld-Messen vorkommende Fälle, mit Stäben, dem Astrolabio, der Boussole, und der Mensul, in Ausmessung eintzeler Linien, Flächen und gantzer Revier. Augsburg: Jeremiah Wolff, 1755 [bound with] Zugabe Zur Praxi Geometriæ. Augsburg: Heirs of Jeremiah Wolff & Johann Michael Probst, 1754, 2 parts in one volume, folio, engraved frontispiece, woodcut initials, 39 folding engraved plates, contemporary calf, speckled edges, (bought from Historical Technology, Marblehead, MA, 1990), [T&W P38, P39; not in VD18], first title with marginal repair, binding rubbed and repairedii. Gnomonica fundamentalis & mechanica. Augsburg: Johann Michael Späth for Johann Georg Hertel, 1768, folio, engraved frontispiece (folding, bound at back), 15 folding engraved plates (edge-mounted on thick paper), modern half reused vellum, marbled boards, speckled edges, (bought from Jeffrey D. Mancevice, Worcester, MA, 1989), [T&W P37; not in VD18], minor staining, binding slightly rubbed

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."