. Official proceedings . for application to any par-ticular service, whether that service lies beyond its range, andfinally, whether or not there is a place properly filled by the oil-electric only, hinges on the answers to these three cpiestions : pirst—What power will be required? Second—What duty cycle is involved? Third—Will the first cost difterential and the interest anddepreciation charges be overcome within a reasonable time by thesavings effected in operation? In addition, other factors such as availability, visibility foroperator, cleanliness, safety, elimination of noise, negotiatio
. Official proceedings . for application to any par-ticular service, whether that service lies beyond its range, andfinally, whether or not there is a place properly filled by the oil-electric only, hinges on the answers to these three cpiestions : pirst—What power will be required? Second—What duty cycle is involved? Third—Will the first cost difterential and the interest anddepreciation charges be overcome within a reasonable time by thesavings effected in operation? In addition, other factors such as availability, visibility foroperator, cleanliness, safety, elimination of noise, negotiation ofsharp curves, and clearance limitations should be considered inthe selection of motive power. Everything we have said pertaining to the application of theoil-electric also applies to its kindred type of equipment—the gas-electric. The principle difference between the two is that thegas-electric has lower lirst cost and higher operating expense. Forservice in which the luel consumption will be low and gasoline. 15-ton, 110 gasoline electric locomotive, used in steel mill work. 169 relatively cheap, this type of e([uipment will ])r()ve more economi-cril and equall}- effective. The folhnvin^- tyi)es of service are generally considered bythe operating departments as ones where considerable economiescan be effected b\- internal combustion electric locomotives. First: Outlying i)()ints or small terminals, where savings infuel, ease of handling, no stand-by losses, and no water and watertreatment costs, are involved; in labor, Avhere fireman, overtmie,labor due to hostling, ash handling, and engine watchmen wouldbe eliminated; in maintenance—for instance, a gas-electric locomo-tive might have many light running repairs made by the enginemanwho might l)e paid a small extra amount per month over his usualrate for this service; no peddling and attendant fuel and laborcosts, and less investment in engine house facilities. Second : Economies can l)e effected l)y oil and
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