What a Geologist Can Do in War
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[13] TRENCHES AND TUNNELS The geologist, when circumstances permit, can locate the more easily worked and dryer formations for digging trenches and tunnels, and can thus often save not only unnecessary time and labor, but the calamity of wet trenches with the resulting rheu- matism, pneumonia, tuberculosis and other diseases. He cannot always perform this service, for trenches must be dug where strategic necessity re- quires them, and, moreover, an army often cannot wait until the geologist mak...es his examination ; but when op- portunity permits, the geologist, more than anyone else, can be useful in this matter. An instance of how tunnels and underground openings can be kept dry, even among forma- [14] TRENCHES AND TUNNELS tions that are mostly wet, is shown remarkably in the case of the under- ground railways in London. The old original underground railways were dug near the surface, often in porous, water-bearing materials, and were damp and uncomfortable. The new underground railways, com- monly known as the tube-railways, were made largely in the " London Clay, " which formation, though un- derlaid and overlaid by wet strata, is itself so impervious to moisture that excavations made in it are compara- tively dry.
What to read after What a Geologist Can Do in War?
You can find similar books in the "Read Also" column, or choose other free books by R a F Richard Alexander Fullerton Penrose to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
[13] TRENCHES AND TUNNELS The geologist, when circumstances permit, can locate the more easily worked and dryer formations for digging trenches and tunnels, and can thus often save not only unnecessary time and labor, but the calamity of wet trenches with the resulting rheu- matism, pneumonia, tuberculosis and other diseases. He cannot always perform this service, for trenches must be dug where strategic necessity re- quires them, and, moreover, an army often cannot wait until the geologist mak...es his examination ; but when op- portunity permits, the geologist, more than anyone else, can be useful in this matter. An instance of how tunnels and underground openings can be kept dry, even among forma- [14] TRENCHES AND TUNNELS tions that are mostly wet, is shown remarkably in the case of the under- ground railways in London. The old original underground railways were dug near the surface, often in porous, water-bearing materials, and were damp and uncomfortable. The new underground railways, com- monly known as the tube-railways, were made largely in the " London Clay, " which formation, though un- derlaid and overlaid by wet strata, is itself so impervious to moisture that excavations made in it are compara- tively dry.
What to read after What a Geologist Can Do in War?
You can find similar books in the "Read Also" column, or choose other free books by R a F Richard Alexander Fullerton Penrose to read onlineMoreLess
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