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 159
e eitherinto the front head just above the tubes^ or into the topof the shell. The nipple entering the boiler should havea long thread cut on the end which screws into the sheet, 146 Steam Engineering and to this end^ inside the boiler there should be connectedanother pipe which shall extend… … end to within a few inches of the back head, then at rightangles across the top of the tubes to the other side, and fromthere discharge downward. By this method the feed wateris heated to nearly, if not quite, the temperature of thewater in the boiler before it is discharged. One of theobjections…
