...Leonard John Murdock © Thomas Telford Ltd 1948 EFFICIENCY CONCRETE MIXING PLANT QUALITY MACHINERY EQUIPMENT CEMENT AGGREGATES WATER MEASURING TANKS CALCULATIONS PROPORTIONS MIXED TESTS CONTINUOUS PAVERS MIXERS ROTATING DRUMS PANS CONSTITUENTS HOPPERS MEASUREMENT...

... self-cleaning andthey work continuously, eliminating solids from the liquid flowing throughthem,and disposing of these solids also continuously. The common principle of various types lies in theuse of a drum, disko, r band of the straining fabric,part of which is submerged inthe fluid to be strained...

... at the seams, the caustic embrittlement in boiler-drums and the fact that in anycase riveting became impracticable in certaincircumstances, solid forgings or welded seams being essential. Whether solid-forged pressurevessels were better than welded vessels was, perhaps, a matter of opinion, but it was certain...