. Revised and enlarged ed. of the science of railways . cation of these law^s. Many undeter-mined elements appear in the application of elec-tricity to the heavy service of general arise, however, not from the uncertaintiesof electricity in its generation, transmission orapplication, but in many of the other elementswhich are involved. For instance, the introduc-tion of higher speeds than those which havebeen attained involves no fundamental electricalquestion, but it does involve innumerable mechan-ical problems. The extension of electricity into new fields ofelectric traction
. Revised and enlarged ed. of the science of railways . cation of these law^s. Many undeter-mined elements appear in the application of elec-tricity to the heavy service of general arise, however, not from the uncertaintiesof electricity in its generation, transmission orapplication, but in many of the other elementswhich are involved. For instance, the introduc-tion of higher speeds than those which havebeen attained involves no fundamental electricalquestion, but it does involve innumerable mechan-ical problems. The extension of electricity into new fields ofelectric traction is, therefore, dependent more 524 RAILWAY EQUIPMENT. upon mechanical thanelectrical conditions, as-suming the electricalengineer has no new ele-ments with which to , however, he has newmaterial or new propertypresented to him, such asa higher magnetic perme-ability, or a higher con-ductivity for current, hewill utilize it in cheaper and more efficientmachines and circuits. If a new source of elec-tric energy be discovered, some method of trans-. Railway Motor.
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