Twentieth century hand-book for steam engineers and electricians with questions and answers; a practical non-technical treatise .. (1913)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 12
dicates it to his fellowcraftsmen, the engfineers of America. Calvin F. Swingle. \ The Boiler Stationary boilers may be divided into four differentclasses. The- first and most simple type, and the one fromwhich the others have gradually evolved, is the plain cylin-der boiler in which the heated… … Fig. 1return tubular boiler—showing setting Next comes the flue cylindrical boiler, which is somewhatlarger in diameter than the former, generally 40 in. diam-eter and 20 to 30 ft. long, with two large flues 12 to 14 in.diameter extending through it. The return tubular boiler, 1 steam Engineering
