ADVERTISEMENT. THE Institution is not, as a body, responsible for the facts and opinions advanced in the following Papers read, or in the abstracts of the conversations which have occurred at the Meetings during LONDON: PRINTED BY WILIAM CLOWES AND SONS, STAMFORD STREET AND CHARING CROSS. THE INSTITUTION OF CIVIL ENGINEERS. SESSION 1872-73.-PART II. March 25, 1873. T. HAWKSLEY, President, in the Chair. No. 1,340." The Mont Cenis Tunnel." By THOMAS SOPWITH, Jun., M. Inst. C.E.1 In the beginning of 1864, the Author submitted to this Institution a Paper upon "The Actual State of the Works on the Mont Cenis Tunnel, and Description of the Machinery employed," in which he gave the information he had been able to obtain, during two visits to the works, in the autumn of 1860, and the summer of 1863, respectively. At the latter date, although the works had been in progress since the end of 1857, about 5 years, only 2,542 mètres of gallery had been pierced, or about th of the total length. At the end of 1870, 7 years afterwards, the entire distance had been traversed. The Author again visited the tunnel in November, 1871, when it had been for some months open to traffic; and in the present communication, which is offered as supplementary to his former Paper, will describe : :- 1. The tunnel as completed, with statistics obtained either by actual observation, or from the Engineers in charge, or from official publications of the Italian Government. 1 The discussion upon this Paper extended over portions of two evenings, but an abstract of the whole is given consecutively. 2 Vide Minutes of Proceedings Inst. C.E., vol. xxiii., p. 258. [1872-73. N.S.] B |