Steam:
Its Generation and Use

15—Durability. Besides the important increase of durability due to the absence of deteriorating strains, and of thick plates and joints in the fire, there is no portion of the boiler exposed to the abrasive ac- tion which so rapidly destroys the ends of fire tubes, or to the blow-pipe action of the flame upon the crown sheet, bridge walls and tube sheets, which are so destructive frequently to or- dinary, particularly locomotive boilers. Neither is there any portion of the surface above the water level exposed to the fire. For these reasons these boilers are durable, and less liable to ordinary construction. They can be made in parts small enough for mule transportation, if required. 17.— Repairs. As now constructed these boilers seldom re- quire repairs, but should, from any cause, such be necessary, any good mechanic can make them with the tools usually found in boiler shops. Should a tube require to be renewed it can be removed, and a new one substituted the same as in a tubular boiler. 18.— Practical Experience. The above advantages would be worthy of at- tention if they were only theoretical, but they have I I ................ ! 1 ni1 mi.niiiiiiiMn«« i..... .............. "i mu mm. ■II Ir.n.in 1.1. t ii Babcock & Wilcox Boilers, 164 H. P., erected 1884 for Greenfield & Co., Confectioners, Brooklyn, N.Y. ■ 1 repairs, than other boilers under the same cir- cumstances, and having the same care. 16.—Ease of Transportation. Being made in sections, which are readily put together with a simple expanding tool, these boilers may be easily and cheaply transported where it would be impossible to place a boiler of been, in fact, demonstrated by the experience of twenty years, under a great variety of circum- stances and of treatment. Of the total num- ber sold, less than two-per cent, have, so far as we are aware, been thrown out of use ; while a large number of customers have repeated their orders — some a score of times, — as will be seen by the list of references hereto appended.