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Excerpt from Rudimentary Treatise on Steam Boilers: Their Construction and Practical Management
Without agreeing in the opinion expressed by M. Pambour in the introduction to his excellent treatise on Railway Loco motive engines, namely, that the theory of the steam engine itself has not yet been explained, we may with much truth a¿irm, that with respect to the steam boiler, even up to the present period his words are peculiarly applicable, however successful has been the general practice.
Under such circumstances it is not surprising that a great variety of Opinions are held on the subject. This di¿'erence of opinion relates not only to the form of boiler best adapted to supply the greatest quantity of steam with the least espen diture of fuel, but also to its dimensions or capacity suitable for an engine of a given number of horses' power; the mere arithmetic of the question remaining up to this day unsettled, or not generally agreed on: this latter subject we propose to consider principally in this and the two following chapters.
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