. Revised and enlarged ed. of the science of railways . almost simultaneously in differentcountries. In describing a change, therefore,that we will say occurred in the United Statesin 1846, it may be possi1)le this change wasmade in England or Scotland in 1845. Whethertliis is so or not is of little account, or whetherthe discovery was made by an Englishman, anAmerican or a Frenchman. It is the fact Iseek. That has an interest and value to allmankind. The other is merely local and tem-porary. Let me illustrate this. The American 44 RAIL^yA Y EQUIPMENT. locomotive has exceeded the English built
. Revised and enlarged ed. of the science of railways . almost simultaneously in differentcountries. In describing a change, therefore,that we will say occurred in the United Statesin 1846, it may be possi1)le this change wasmade in England or Scotland in 1845. Whethertliis is so or not is of little account, or whetherthe discovery was made by an Englishman, anAmerican or a Frenchman. It is the fact Iseek. That has an interest and value to allmankind. The other is merely local and tem-porary. Let me illustrate this. The American 44 RAIL^yA Y EQUIPMENT. locomotive has exceeded the English built enginein its ability to haul a big load at a highrate of speed. Why is this so? Because of itsgigantic boiler, high steam pressure and enor-mous heating surface. This great boiler createsa vast storehouse for the generation of steam,unknown, until later years, in any other ma-chines in the world, while the bogies enableit to wind in and out on a track which therigid frames, so long the predominating patternin other countries, would not have been able. The John Stevens. Camden & Amboy Railway, 1849. to traverse. The superiority of the Americanengine in this particular is generally grew out of the necessities of transportationin the United States, mainly our great distances,and heavy loads and sharply curved tracks. Theonly material fact in all this to the student ofthe world is to know there is such a locomotivein successful operation, what it is like, andwherein it is superior to others in the accom-plishment of certain results. Whether this loco-motive was constructed in Schenectady or Glas-gow is of no importance to the worlds student. EVOLUTION OF LOCOMOTIVE. 45 For these reasons, in my description of theevolution of the locomotive (and, indeed, of themachiner}^ department generally), I shall striveto describe as nearly as I can the facts merely,without occupying too much space over unim-portant details of place, and without strainingto determine to whom the f
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