Handbook for the use of electricians in the operation and care of electrical machinery and apparatus of the U.S. seacoast defenses (1902)
United States. War Dept, Anderson, George Lucius, 1849-1934 · Washington, Govt. Print. Off. · leaf 19
d and scrapedclean on both furnace and fire sides whenever the boileris cleaned, li is the fusible metal in the uiiper part ofthe plug P, so that when it melts from low water thereis still water covering the crown sheet Q. 13. Several manholes arc placed in large boilers, and hand-holes in small,… … 7. Fusible Plug. CARE OF BOILERS. 13 (E) THE FEED WATER. The feed water ought to be pure and hot. Rain water is iisually satisfactory;well water is often good, sometimes very bad for the boiler. When the sourceis untried or the boiler is new, the man or hand holes are freqiiently opened tosee if…
Electric machinery · Searchlights · Coast defenses
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