GONNELLA, DESCRIZIONE DI DUE MACCHINE ARITMETICHE PER L'ADDIZIONE, FLORENCE, 1859, WRAPPERS

FIRST EDITION, 4to (260 x 172mm.), 2 folding lithographed plates, original printed pink paper wrappers, UNCUT, light foxing, small tears at fold to both plates, wrappers slightly worn

Tomash & Williams G57

Condition is described in the main body of the cataloguing, 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."

Gonnella presented his calculating machine at the Great Exhibition in London in 1851, where it won the highest medal. His researches were funded by Leopold II, Grand Duke of Tuscany, to whom he gave one of the three calculating machines constructed in 1857. The first machine described here is a dial adder, similar to Pascal's machine, and the other later machine (devised in 1857) is a keyboard single-digit adder or column adder. Examples of both machines survive today, the first in Bonn, the second in Florence.