Bowden-Smith, Edward Cyril · New York, D. Van Nostrand Company · leaf 192
on-sidering in 1919 air was being used for auxiliary pur-poses, laboratory work, and burning oil under steamboilers, the increase in leakage from the air main isextremely smal. And it must be remembered thatduring this period practically no opening up or recaulk-ing of the mains had taken place. It… … ■•I Pi H W 166 EFFICIENCY OF PUMPS AND EJECTORS the volume of air is also greater instead of less, the extrapressure will account for this result. On the other hand(see Plates XXIII. and XXIV., September 1917), theextra volume of water is so large as to still show a lessvolume of air per gallon,…
Pumping machinery
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