Twentieth century handbook for steam engineers and electricians, with questions and answers; a practical nontechnical treatise on the care and management of steam engines, boilers and electric machinery (1922)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 15
Fig. 4 bear view of 250 h. p. c ah all horizontal boiler suspended ready for brick work Cahall Water Tube Boiler 7 ternal heat^ which has been heretofore one of the greatestfaults found with this type of boiler. All the tubes used in this boiler are made of the bestknobbled charcoal iron, which…
