Paris: Gauthier-Villars, 1876. First. paperback. , 108,  pages. Slim 4to, older patterned boards, neatly re-backed in plain brown cloth and with original front wrapper bound-in. Paris: Gauthier-Villars, 1876. First edition. A very good(+) clean copy, inscribed by the author on cover to I.L. Fuchs, the German mathematician. very good(+).