Compressed air . FIG. g. them here. A weak structure and insnfli-cient bearings (based on a Uiistaken ideaof reduced strains), with no provisionfor unexpected contingencies, resulting inexcessive friction losses; nmUiiilicity ofwearing parts, absorbing a large portionof the power theoretically saved; heatedand restricted air passages, ineflicientvalves, neglect of proper jacket and headcooling; small and ineffective inter-coolers; poor workmanship, resulting inleakage losses. Not only may the enumerated defectslargely offset the saving by compression that the machines are standard t\i)cs oiAme

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Compressed air . FIG. g. them here. A weak structure and insnfli-cient bearings (based on a Uiistaken ideaof reduced strains), with no provisionfor unexpected contingencies, resulting inexcessive friction losses; nmUiiilicity ofwearing parts, absorbing a large portionof the power theoretically saved; heatedand restricted air passages, ineflicientvalves, neglect of proper jacket and headcooling; small and ineffective inter-coolers; poor workmanship, resulting inleakage losses. Not only may the enumerated defectslargely offset the saving by compression that the machines are standard t\i)cs oiAmerican builders of established reputa-tion at home and abroad; the two manu-facturers have been distinguished by theterms Maker A and Maker B. Theobject of the tests was primarily to ascer-tain the comparative economies of com-pound compressors of average type andsimple machines of the highest grade,more especially under practical conditionsof continuous use. To make the tests fair and representa-tive, compressors

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Keywords: ., bookcentury1800, bookdecade1890, booksubjectcompres, bookyear1896