. Ingénierie ferroviaire et de locomotive : un journal pratique de la force motrice ferroviaire et du matériel roulant . agencement du guide pour l'extrémité de la tige de piston extendedet un chariot radial traîné extérieur amélioré. Pour tige de valve. Le principal avantage de cet arrangement est qu'il peut être érigé, pris et remplacé avec-out n'importe quel alignement, en même temps en sursursurant que le guide de tige de soupape estabsolument en ligne avec le piston valvechamber. Cela permet de gagner tout le temps passé à aligner le guide de tige de soupape de la construction ordinaire avec le Walschaerts ValveGear lorsque cela est nécessaire

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. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . ewarrangement of guide for the extendedpiston rod end, and an improved out-side radial trailing truck. for valve stem. The chief advantagesof this arrangement is that it can beerected, taken down and replaced with-out any lining up, at the same time in-suring that the valve stem guide isabsolutely in line with the piston valvechamber. This saves all the time thatis spent in lining up the valve stemguide of the ordinary construction em-ployed with the Walschaerts ValveGear when it is necessary to take downthe valve motion. For these and other reasons, this lo-comotive merits investigation and themost careful study of all the details ofits design on the part of all railroad offi-cials interested in locomotive operationand its performance on the Erie Rail-road on which it is running and ofwhich a full account will be given ina later issue. The following are some of the prin-cipal dimensions of this locomotive: Cylinder—Type, simple piston valve;diameter, 27 lbs.; stroke, 28 ins.; track. FIFTIETH THOUSAND LOCOMOTIVE BUILT BY THE AMERICAN* LOCOMOTIVE COMPANY. to any railroads existing standards, thebuilders had free hand to embody, inthis design, their ideas of the best prac-ticable locomotive engineering practice. To accomplish the purpose of thedesign—the maximum capacity perpound of weight—the largest boilercapacity within the predeterminedwheel loads was the essential feature. This end was obtained by eliminat-ing every pound of weight in all theparts that was not necessary tostrength or durability and by utilizingthe weight thus saved to provide alarger boiler and by increasing thecapacity of the boiler thus secured bycombining in one design the most ap-proved fuel saving devices to obtainthe utmost economy in boiler and cylin-der performance. The superheater is of the type Awith top header and double loopedsuperheater tubes. It consists of 36 By the use of t

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