WATER IN THE SIMPLON TUNNEL
The volume of water, constantly increasing, hinders operations in the Simplon tunnel through the Alps, even although that tunnel starts at the summit of the mountain, 6,000 feet above the line of railway. After percolating through beds of limestone the water becomes almost boiling hot and flow’s into the tunnel at a temperature of from 112 degrees to 140 degrees, rendering not only work, hut life impossible without resort to artificial means of refrigeration. The engineer, by turning cold air on hot air and cold water on hot water, has reduced the temperature in the tunnel from 140 to seventy degrees Fahrenheit. The volume of water flowing out of the south end of the tunnel is over 15,000 gallons a minute, and furnishes motive power sufficient not only to work the refrigerating apparatus, but to compress the air by which the drills are oper ated.