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 240
quirements. In brief,the principle of this consists of automatically supplyingmore steam to the engine when the boiler pressure lowers,and less steam when the steam pressure increases. Thishas been brought to so fine a point that practically a con-stant pressure is maintained on the boilers with…
