Page:Whymper - Scrambles amongst the Alps.djvu/103

Rh About four thousand men are now employed on the tunnel, and they complete ten to eleven feet every day. The average daily progress of the last five years is ten feet one inch. Each yard of progress costs at the present time about £200, or just double the average of railway tunneling in England. There are many yards, however, which have cost infinitely more than £200 per yard. The work is now so far advanced that the engineers can estimate with some probability what the total expenditure will amount to. They place it at £3,000,000 (£224 per yard), which sum includes