. American ENGINEER and Railroad journal . l service sur cette route depuis un certain nombre d'années, mais différent de leurs prédécesseurs en étant équipés d'un surchauffeur, réchauffeur et engrenage à vannes Walschaert. Les locomotives de passagers sont une conception complète et distincte de tout ce qui a jamais été construit avant ce service, étant un mélange articulé Mallet de la conception du cording aux records donnés dans le SjiiIu Fe Employees Magazine. De deux moteurs qui étaient r i mi tober, 1904, un a fait 205,262 miles befon révision générale, avec un total moyen cosl vers le haut i que la chaux de 4.8 cents par mil

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. American engineer and railroad journal . l service on this road for a number of years, but differfrom their predecessors in being equipped with a superheater, reheater and Walschaert valve gear. The passenger locomotives are a complete and distinct de-parture from anything that has ever been built before forthis service, being a Mallet articulated compound design of the cording to records given in the SjiiIu Fe Employees Magazine. Of two engines which were r i Mi tober, 1904, one made 205, 262 miles befon general overhauling, with an average totalrepair cosl up i that lime of 4.8 cents per mile. The other made184, 399 miles at a cost of 4.3 cents per mile. One engine receivedin August, 1905, was not sent to the shop for general over-hauling until July 21, 1909, and had made a mileage of 227, 902miles. The different designs will be taken up and discussed sepa-rately. Mallet Arth ulated Pa i sger Locomotives. A passenger locomotive giving a theoretical tractive effortof 53, 000 lbs. but a t>w years ago would have been considered. i I END ELEVATION AND SECTIONS OF MALLET PASSENGER LOCOMOTIVE. 44-6-2 type and weighing 376, 450 lbs., of which 268, 000 lbs. ison drivers. They have a tractive effort of about 53, 000 lbs.The freight locomotives weigh 462, 450 lbs., thus exceeding theSouthern Pacific engines by 36, 550 lbs. in total weight, andhaving 18, 200 lbs. more weight on drivers. Both of these de-signs are arranged to traverse 160 curves. The Atlantic type en-gines weigh 222, 150 lbs., of which 114, 800 lbs. is on drivers, mak-ing them the heaviest of this type, in respect to total weight, onour records. These engines are the latest development of a veryinteresting series of locomotives, which have given most excellentresults in high speed passenger service. They have been remark-able in the amount of mileage performed between repairs, ac- a practical impossibility. This is about 50 per cent, more powerthan is given by the present mest powerful engine havingdriving wheels ove

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