An interesting trial of one of Brunton’s tunnelling machines has just taken place. A model was exhibited at the last conversazione at the Institute of Civil Engineers, and at the soiree of the British Association in Liverpool. The present trial was made in the grey chalk at Snodland, Kent, at the quarry belonging to Messrs Lee and Son, of Holbrough. This demonstration was made chiefly to show the ease and rapidity with which a tunnel may be driven through such a formation as that which lies under the channel between England and France. The rate at which the machine advanced was 3ft. 9in. per hour, in a tunnel 7ft. in diameter, and it was obvious to those who witnessed the operation that the only real limit to the rate of progress would be the rapidity with which the waggons loaded by the machine’s own action could be carried away. The ease with which the machine worked astonished the largo party of practical and scientific men who were present.
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Cromwell Argus, Volume 2, Issue 84, 20 June 1871, Page 7
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168Untitled Cromwell Argus, Volume 2, Issue 84, 20 June 1871, Page 7
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