Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. (1916)
American Technical Society · Chicago : American Technical Society · leaf 31
-peri-ments Mean Ef-ficiency OF TWO BEST Ex-periments LowestEffi-ciency Mean Ef-ficiency OF ALL Experi-ments Lancashire hand-fired 107 79.5 42.1 62.3 Lancashire machine-fired 40 73.0 51.9 64.2 Cornish hand-fired 25 81.7 53.0 68.0 Babcock and Wilcox hand-fired 49 77.5 50.0 64.9 Marine wet-back… … Fig. 2. Diagram of Ring System of Piping adapted for large sizes. These may be constructed for 150-poundpressure, large enough to evaporate 20,000 pounds of water perhour, at an economical rate. 23 POWER STATIONS 13 Boilers of the multitubular type or water-tube boilers are usedin the majority of…
Electrical engineering
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