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To this effect, it is intended to use drills actuated by electricity through dynamos driven by waterfalls. The Ferroux system seems preferable to the Brandt and other hydraulic systems, seeing the danger of the water being frozen in the conduits placed outside of the tunnels. Le Genie Civil.
Soon a dim, sepulchral light penetrated the vertical gallery, which became wider and wider. I could make out to the right and left long dark corridors like immense tunnels, from which awful and horrid vapors poured out. Tongues of fire, sparkling and crackling, appeared about to lick us up. The hour had come! "Look, Uncle, look!" I cried. "Well, what you see are the great sulphurous flames.
"Why, there isn't a breath of air," thought Rodd, and then he started back, dazzled by the brilliant glare of the lightning, which made him involuntarily close his eyes and keep them shut till the terrific crash of thunder, which seemed to burst exactly over his head, had gone rolling away as if its echoes were composed of gigantic cannon balls passing slowly down metallic tunnels right away into space.
At last, after many penetrations, I managed to bring in a view of the head of the shaft at the bottom of which I knew the tunnels were located, and saw that we were none too soon, for all the corridors leading toward this shaft were packed with Hans waiting their turn to descend. Slowly I let my "eye" retreat down one of these corridors until I "pulled it out" through the outer wall of the city.
I saw the port no longer as a mere body of water, but with a whole region deep beneath of these long winding tunnels through which flowed the traffic unseen and unheard. I saw along the waterfronts continuous lines of docksheds where by huge cranes and other devices the loading and unloading could be done with enormous saving of time.
It may also be applied externally as warning-lights at the front and end of trains passing through tunnels, and in other similar cases, also to ordinary carriages, either internally or externally.
Already in Chili they are mining coal under the bed of the Pacific Ocean, and the traveler may ride on electric cars through solid tunnels of coal beneath the waters of the greatest ocean. The tin mines in Wales extend far out beneath the sea. Workers in the Calumet and Hecla mines work beneath the waters of Lake Superior. Oil wells are worked out beyond the edge of the Pacific Ocean.
"Down these tunnels we shall depart to our new cities, deep under ground, and scattered far and wide through the mountains. They are nearly completed now.
There appears also, in many cases, to be such a correspondence in the openings of caverns on opposite sides of some of the valleys, both large and small, as to incline one to suspect that they originally belonged to a series of tunnels and galleries which were continuous before the present system of drainage came into play, or before the existing valleys were scooped out.
Soon they heard the sound of war-cries and the splashing of water from the tunnels. Smoke poured into the room from the quenched and dying fires. It disappeared almost as fast as it came. Evidently the Lorens were masters of air-conditioning. Odin was thankful. Knowing Grim Hagen, he had been fearful of gas. Now that seemed unlikely.
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