. Cassier's magazine. rive and electric distribution ofpower in much of the new develop-mental work now being undertaken,and the substitution of electricity forcompressed air is making considerable advance in the re-equipment of some ofthe mines already in production. Thedistribution of electrc power through theshafts, tunnels, headings and stopes ofa mine is not a matter of difficulty, spe-cial cables and wiring devices havingbeen particularly designed for the an installation is much more flexi-ble than an air or steam system. Inci-dentally, the electric light can be used,and in a w
. Cassier's magazine. rive and electric distribution ofpower in much of the new develop-mental work now being undertaken,and the substitution of electricity forcompressed air is making considerable advance in the re-equipment of some ofthe mines already in production. Thedistribution of electrc power through theshafts, tunnels, headings and stopes ofa mine is not a matter of difficulty, spe-cial cables and wiring devices havingbeen particularly designed for the an installation is much more flexi-ble than an air or steam system. Inci-dentally, the electric light can be used,and in a well-lighted mine the efficiencyof the men is far greater than it can bein mines lighted by more primitivemethods. Pumping, hoisting, ventilat-ing, haulage, and, recently, rock drill-ing, by means of electric motors illus-trate how the power supply may bedistributed not only more directly andcompactly than by systems employingpipes, but also at materially decreasedexpense of direct attendance and lossesof FIG. I.—AN EXCURSION TRAIN DRAWN BY FOUR FELL ENGINES ON THE RIMUTAKA INCLINE. GRADE,I IN 15; WEIGHT OF TRAIN, 174 TONS; LENGTH OF TRAIN, 648 FEET LOCOMOTIVE PRACTICE ON THE NEW ZEALANDGOVERNMENT RAILWAYS By Charles Rous-Marten INTEREST of a somewhat specialand multiplex character attaches toNew Zealand locomotive engineer-ing. In the first place, there is the non-technical phase. Of all British colonies,New Zealand is the most British. Asregards a large proportion of its totalarea, a visit thither might be merely astep from one English county into an-other, so similar are most of the naturalfeatures, and still more markedly thecharacteristics of the population. New Zealand is emphatically andmore than merely figuratively TheBritain of the South, as it has so oftenbeen styled. But from the technicalviewpoint the interest is infinitelygreater, owing to the extraordinary 372 variety of conditions under which rail-way work has to be carried on in thatcolony, these
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