Bowden-Smith, Edward Cyril · New York, D. Van Nostrand Company · leaf 163
rtical line indicating theposition of an excavation. These diagrams, however,were made from the information derived in sinking thecast-iron tubbings and not from previous excavations,but their value was obvious in the construction of thedeeper sewers. 136 EFFICIENCY OF PUMPS AND EJECTORS The… … On looking at the plan of the city, Plate XVII., the areaof the impervious clay deposit will be noticed. It isthat portion within the hatched outhne. The sites appearto be selected in a haphazard manner, but it must be THE SANITARY EFFICIENCY 137 remembered that they are situated for the most part…
Pumping machinery
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