MEASURING INSTRUMENTS--AMSLER INSTRUMENTS, THREE WORKS

i. Amsler, A. Instructions for using J. Amsler-Laffon's mechanical integrator. Schaffhausen: Brodtmann, 1883, folding plate, original printed wrappers, with, laid down on the reverse of the title page, a letter on behalf of Amsler-Laffron & Sohn, to the London instrument dealers W.F. Stanley & Co., stating prices for integrators, 30 August 1890, slipcase, (W.F. Stanley & Co., bookplate; Rogers Turner, London, Catalogue 118, item 3; bought from Rogers Turner, 2000), [T&W A75], wrappers repaired ii. Raymond, William Galt (1859-1926). Almsler's [sic] polar planimeter. [1892] [offprint from:] Johnson's Surveying, 11th edition ("a few copies are issued in this form for the Class of '95, Rensselaer Polytechnic Institute"), vignettes, original printed wrappers, ownership inscription on upper cover, (bought from AGatherin', Wynastskill, NY, 1982), [T&W R17]iii. Sebert, Hippolyte (1839-1930). Notice sur l'intégromètre Marcel Deprez et le planimètre Amsler. Paris: Tanera, 1876, folding plate, vignettes, original printed wrappers, inscribed on half-title ("Monsieur Regray Hommage de l'inventeur Marcel Deprez"), (Chemins de Fer de l'Est, library stamps; bought from Palinurus, Philadelphia, 1990), [T&W S77], wear to wrappers, spotting8vo

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."

Jakob Amsler-Laffron (1823-1912) was a Swiss mathematician and engineer. His company, later managed by his son Alfred, specialised in the manufacture of planimeters and integrators.