History of Sanitation
Forfatter: J. J. Cosgrove
År: 1910
Forlag: Standard Sanitary Mfg. Co
Sted: Pittsburgh U.S.A
Sider: 124
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HISTORY OF SANITATION
83
Only one brief century has passed since waterworks
pumping stations were introduced in the United States,
but what wonderful improvements have been made in
pumping machinery design within that short space of time!
Steel and iron have taken the place of wood in the manu-
facture of boilers and pumps, and instead of the leaky,
unsatisfactory apparatus of other days, even when working
under low pressures, we now have pumping engines which
will work continuously month after month under several
hundred pounds pressure, and deliver the daily volumes of
from a few hundred to many million gallons of water.
Modern Vertical Triple-Expansion Pumping Engine