. American Engineer and Railroad Journal . r Praxis wird bald von der TechnologicBranch of the United States Geological Survey herausgegeben werden. Die Autorendes Bulletins, Walter T. Ray und Henry Kreisinger, haben in der Übertrag der besonderen Arbeit, die ihnen im allgemeinen Plan für die Erhaltung der Brennstoffressourcen des Landes zugewiesen wird, dieses tosay in ihrem Bulletin : Die bisher durchgeführten Experimente scheinen darauf hinzuweisen, dass es möglich ist, die Kapazität einer Anlage zu verdoppeln oder zu verdreifachen, ohne radikale Änderungen in den Öfen und Kesseln vorzunehmen. Diese in-Knicke erfordern etwa doppelt und verdreifacht die Quant

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. American engineer and railroad journal . r Practice is soon to be issued by the TechnologicBranch of the United States Geological Survey. The authorsof the bulletin, Walter T. Ray and Henry Kreisinger, in carryingout the particular work assigned to them in the general plan forthe conservation of the fuel resources of the country have this tosay in their bulletin : The experiments so far made seem to indicate that it is possi-ble to double or treble the capacity of a plant without makingany radical changes in the furnaces and boilers. These in-creases require about double and treble the quantities of air tobe put through the fuel beds and boilers. It also seems probablethat rebaffliug the boilers will often permit the capacity to bedoubled or trebled, while still getting more steam than formerlyper pound of coal for uses outside the boiler room. These experiments were undertaken with the object of clari-fying ideas concerning the passage of air through fuel beds andboilers. Measured weights of air were passed through two beds. MACHINE FOR GRINDING CAR WHEELS, PENNSYLVANIA RAILROAD AT ALTOONA. of lead shot, in series, one of which remained always the sameand represented a boiler; the other being varied as to size ofshot and depth of bed, and representing a fuel bed. Careful ob-servations were made of the weight of air passing through thebeds per minute. All data were plotted in many charts, so as topermit the study of them from several points of view. A numberof laws were deduced bearing on the relative amounts of powerrequired to force air through fuel beds of various thicknesses, composed of various sizes of coal, and through boilers of variouslengths and areas of gas passages. An important part of the discussion relates to an increase inthe capacity of boilers by increasing the amounts of power whichmust be applied to pressure and exhausting fans in order to forceseveral times as much air through the fuel beds and boilers. It may be possible, as a result of these

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• bookcentury1800
• bookdecade1890
• booksubjectrailroadengineering