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MINUTES OF PROCEEDINGS

OF

THE INSTITUTION

OF

CIVIL ENGINEERS;

WITHI

ABSTRACTS OF THE DISCUSSIONS.

VOL. XXXVI.

SESSION 1872-73.-PART II.

EDITED BY

JAMES FORREST, Assoc. Inst. C.E., SECRETARY.

INDEX, PAGE 354.

LONDON:

Published by the Institution,
25, GREAT GEORGE STREET, WESTMINSTER, S.W.

1873.

[The right of Publication and of Translation is reserved.]

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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 the Session.

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LONDON: PRINTED BY WU LIAM CLOWES AND SONS, STAMFORD STREET AND CHATING CROSS.

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1,367 Delta of the Danube, and Consolidation of Sir C. A. Hartley

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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

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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, 73 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 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.

present

1 The discussion upon this Paper extended over portions of two evenings, but an abstract of the whole is given consecutively. ? Vide Minutes of Proceedings Inst. C.E., vol. xxiii., p. 258. (1872-73. n.s.]

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