GOLDMANN, TRACTATUS DE USU PROPORTIONATORII, LEIDEN, 1656

FIRST EDITION, folio (305 x 200mm.), parallel Latin and German text, 16 engraved plates, woodcut initials, head- and tail-pieces, vellum, speckled edges, minor marginal staining, small tear to lower margin of plate 5, vellum slightly soiled with worming and pencil markings to lower cover

Reiss & Auvermann, Auktion 54, 20-23 April 1994, lot 1742, Erwin Tomash

Tomash & Williams G53; STCN 832846708; VD17 39:124614C

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."

The author was a private tutor of civil and military architecture in Leiden, introducing mathematical methods in that field. In this work he describes the use of a sector which he had equipped with a separate fortification scale. "The book is unusual in that it not only describes the instrument and gives examples of its use but also provides sixteen engraved plates that contain, besides the illustrations for the problems, complete tables for all the scales on this sector" (Tomash & Williams).