. American engineer and railroad journal . onable. The frame carrying the blue print, as well as the indicating StPTEMBERj 1910. AMERICAN ENGINEER AND RAILROAD JOURNAL. 355 mechanism, is supported by a wooden frame that permits it to bemoved as desired and locates it at a convenient height. Thisframe also carries an adjustable mechanism holding a wirerepresenting the water level which stretches across in front ofthe boiler chart. The mechanism (the photographs show anearlier arrangement) which carries this wire is so constructedthat it will be level at all times and permits it to be readily th
. American engineer and railroad journal . onable. The frame carrying the blue print, as well as the indicating StPTEMBERj 1910. AMERICAN ENGINEER AND RAILROAD JOURNAL. 355 mechanism, is supported by a wooden frame that permits it to bemoved as desired and locates it at a convenient height. Thisframe also carries an adjustable mechanism holding a wirerepresenting the water level which stretches across in front ofthe boiler chart. The mechanism (the photographs show anearlier arrangement) which carries this wire is so constructedthat it will be level at all times and permits it to be readily the material for the copper boK will be a maximum of sixteentimes that for a steel box. Allowance, however, has to be madefor the value of the scrap coppei, which locally was stated to be75 per cent., and allowing s per cent, of this for the steel scrap,this reduces the ratio of the cost of the copper plate to aboutfive times that of the steel. As regards the labor cost of makingthe box, this is in favor of copper. Being the easier metal to. OF \[0r)EL FOR DEMOXST?..\TING THE EFFECT OF ON THE W.^TER LEVEL. adjusted at any height above the crown sheet or at any gaugeof water. One of the illustrations shows the boiler on a level track, orzero per cent, grade, with one gauge of water in the boiler. Onthis the depth of water at any point can be readily seen and meas-ured. Another photograph shows the locomotive descending a3/2 per cent, grade and the level of the water which showedone gauge when locomotive was on the level. The bare crownsheet resulting is very strikingly illustrated. The effect whenascending the same grade or of going up or down any grade can,of course, be shown equally well. This model was originated by W. F. Buck, Superintendent ofMotive Power, and the details were designed and the modelsconstructed under the supervision of M. H. Haig, mechanicalengineer at Topeka. A patent has been applied for covering theidea and the construction. COPPER VS. STEE
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
