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Report Volume 2, No. 6 pdf

Report Volume 2, No. 6. Massachusetts Tunnel

Report Volume 2, No. 6
Author: Massachusetts Tunnel
Number of Pages: 100 pages
Published Date: 01 May 2012
Publication Country: Miami Fl, United States
Language: English
ISBN: 9781231931257
Download Link: Report Volume 2, No. 6

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1863 Excerpt: 33J metres, or 109.33 feet per month, at one face. During the next 23 months, from December, 1855, to October, 1857, inclusive, after passing shaft No. 1, the progress was 559 metres, equivalent to 24.30 metres, or 79.70 feet per month, at one face. From the north entrance, the progress in 19 months, from June, 1854, to December, 1855, inclusive, when there seems to have been an interruption in the work, was 339.90 metres, equivalent to 17.89 metres, or 58.68 feet per month, at one face. In the last 10 months, from January to October, 1857, inclusive, the progress was 173.20 metres, equivalent to 17.32 metres, or 56.80 feet per month, at one face. We see here, that the work from the north entrance, which was on a down grade where the water followed the advance, progressed much more slowly than that from the south entrance, where the water could run off. And we also sec that the work from the south entrance advanced less rapidly in the last half, than in the first half, of the whole distance. The whole distance executed from the two end faces alone, between June 1, 1854, and October 31, 1857, a period of 41 months, was 1744 metres, being an average of 21.27 metres, or nearly seventy feet per month, at one face. My principal object in making a personal visit to the Hauenstein Tunnel was, to see the effect of the absence of shafts upon the ventilation. The tunnel, as has been mentioned, is on a very steep grade. I first rode up through it, standing on the outside platform of a passenger car, at the rear of a passenger train. The tunnel was somewhat cold and damp, but otherwise there was nothing disagreeable in the passage, and I was not at all incommoded by smoke or steam. On reaching the Laufelfingen station, which is at the upper end of the tunnel, I did ...

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