Pocketbook of Useful Formulæ and Memoranda
for Civil and Mechanical Engineers

___________ _____________ ______________________ ______________ molebwokth’s pocket-book ____________ ____________ 470 Boiler Setting. Care should be taken to keep the boiler from contact with the brickwork, which is apt to cause rapid corrosion of the plates. Cast-iron supports should be used to keep the boiler clear from contact. Caulking. Caulking should not be done with too thin or too acute a tool, which for ordinary work should have its end ground to an angle 20° from a right angle, and be 11 meh wide X i®“1® thick, moved about 1 inch after each blow ; one blow at each plaee should suffice. Marine Boiler, 4Ö0 Horse-powe:; (Indicate»). . ft. in. Diameter of boiler ....................n Length of ditto........................ . Diameter of each furnace .. __.............. * ° Diameter of tubes (9 B.W.G.) ......... 0 • * Number of tubes .................... .................... Length of tubes.......................... ft Heating surface—furnace and flues .. .. J( tulles.................... total .... .......... 6S0 1057 1737