A Treatise on the Steam-Engine in Its Various Applications to Mines, Mills, Steam Navigation, Railways, and Agriculture; With Theoretical Investigations Respecting the Motive Power of Heat and the Proper Proportions of Steam-Engines, Elaborate Tables of T (Paperback)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1861 Excerpt: ...enabled to pass freely into the water. Whatever cause facilitates the transmission of heat in a boiler necessarily prolongs its durability, since such a boiler is not liable to burn away and crack in the plates. The best proof of the truth of this doctrine is the fact, that the Peninsular and Oriental Company have some boilers thus constructed now running after ten years' uninterrupted service, and several of their vessels are still at work with boilers from eight to nine years old. The repairs done to the flues of these boilers have been very trifling, and in some cases when the shell of the boilers has been worn out, the flues have been found so good that they have been refitted to new shells. Another advantage which these flues possess over tubes is that they require sweeping Jess frequently. The soot and fine ashes which after a few days steaming must, in the case of tubular boilers, be swept out of the tubes to maintain a proper draft, fall to the bottom of these flues, leaving the main portion of the flue clear and the draft unimpaired, so that on a long voyage it is not necessary to open the smokedoors for the purpose of sweeping the flues. ooooooooo ooooeooop OOPOQOODO SXLAUOCD VIEW OF FOKTlOff OF TUB PLATE IX THE BOILERS OF THE AT-LANT1C. Fig. 216 represents a portion of the tube plate of the species of boilers used in the Collins line of steamers, at one time plying on the Atlantic, and of-which representations are given in Jigs. 217 and 218. These boilers it will be observed are constructed with a double tier of furnaces and with upright tubes, the water being contained within the tubes and the smoke impinging upon them on its passage to the chimney. This species of boiler, which was introduced originally by the Earl of Dundonald, is much used i...