Handbook for the use of electricians in the operation and care of electrical machinery and apparatus of the U. S. seacoast defenses .. (1904)
United States. War Dept · Washington, Govt. print. off. · leaf 18
ned and scrapedclean on both furnace and fire sides whenever the boileris cleaned. R is the fusible metal in the upper part ofthe plug P, so that when it melts from low water thereis still water covering the crown sheet Q. 13. Several manholes are placed in large boilers, and hand-holes in small,… … 7. Fusible Plug. CARE OF BOILERS. 13 (E) TPIE FEED AV^ATER. The feed water ought to be pure and liot. Rain water is usually satisfactory;well water is often good, souietinies very bad for the boiler. When the soureeis xuitried or the boiler is new, the man or hand holes are freciuently opened tosee…
Electric machinery · Searchlights · Coast defenses
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
