(MATHIEU, CLAUDE, MICHEL CHASLES, CHARLES EUGENE DELAUNAY) - THE WIBERG CALCULATING MACHINE PRESENTED.

Rapport sur la machine à calculer présentée par M. Wiberg.

(Paris, Mallet-Bachelier), 1863. 4to. No wrappers. In: "Comptes Rendus Hebdomadaires des Séances de L'Academie des Sciences", Tome 56, No 8. Pp. (317-) 364. (Entire issue offered). The paper: pp. 330-339.

First apperance of this detailled report and examination by the French mathematiciens Mathieu, Chasles and Delaunay of the calculating machine invented by Martin Wiberg as an improvement on the Scheutz machine. The machine could produce tables of logarithms.

"Wiberg modified the Scheutz difference engine, making it smaller and lighter, and used it to calculate a series of interest tables published in 1860. Efter improving the print mechanism of his machine, Wiberg presented it to the Academy of Sciences in Paris, which voted in 1863 to "accorder son approbation à cette belle et ingénieuse machine" (the paper offered). Wiberg later used the machine to produce a set of tables of seven-place logarithms of the numbers from 1 to 1000,000 together with logarithms of trigonometric functions, published in 1876 under the title 'Tables de logarithmes calculées et imprimées au moyen de la machine à calculer sw M. Wiberg'. (Hook & Norman "Origins of Cyberspace", No. 82).

Order-nr.: 48991