. American ENGINEER and Railroad journal . ont beenequipped avec des brûleurs de type inversé. Les mantes, qui, dans le trafic ferroviaire sont continuellement soumis à des chocs et à la vibration, se sont néanmoins avérés assez durables, de sorte que theypeut être utilisé pendant plusieurs mois. Le coût des incandescentmantles moyenne à propos de sd. Il a été constaté que le gaz d'huile pur est moins cher et donne de meilleurs résultats que le mélange de trois parties de gaz d'huile et d'une partie d'acétylène, qui a été introduit sev-eral années auparavant. Les expériences ont prouvé que la lampe à gaz invertedincandescent est beaucoup moins chère, et donne un
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. American engineer and railroad journal . have beenequipped with burners of the inverted type. The mantles, which, in railway traffic are continually subjected to shocks and vibra-tion, have nevertheless proved to be quite durable, so that theycan be used for several months. The cost of the incandescentmantles average about sd. It has been found that pure oil gasis cheaper and gives better results than the mixture of threeparts oil gas and one part acetylene, which was introduced sev-eral years ago. The experiments have proved that the invertedincandescent gas light is far cheaper, and gives at the sametime a much better light than the flame system hitherto em-ployed. The authorities of the German State Railways havetherefore decided to introduce the inverted incandescent gaslight throughout the whole railway system. This great change, which can, of course, only be carried out gradually, is expectedto take two years.—The Engineer (London). H++ 4- -I- + + t t 4 + -Hi % W+T k bl± >FT f + +- f + f t{^ + 4 + T 4+t f ^ T t l*. + f f f fit I Staj Bolts f rf f fttn Number of Mallet Compound Locomotives in the U. S.—There are at present 50 Mallet articulated compound locomo-tives in service in this country, of which one is on the Baltimore& Ohio Railroad in pushing service; five are on the Great North-ern Railway in pushing service; sixteen on the Northern Pacificin pushing service; twenty-five on the Great Northern Railwayin road service and three are in pushing service on the Erie Rail-road. All but one of these locomotives have been built duringthe past two years and most of them during the past year. SECTION OF BOILER, INTERCOLONIAL STEAM MOTOR CAR. 394 AMERICAN ENGINEER AND RAILROAD JOURNAL. (Established 1832). —AMERICAN-ENGINEER railroadjournal PUBLISHED MONTHLY BY R. M. VAN ARSDALE J. S. ISONS M.I, , Business Manager.140 NASSAU STREET, NEW YO R. V. WRIGHT, k. A. A I.ltii.!.. l^dilor;*. SEPTEMBER, 1907 Subscriptions.—$2.00 a year for the United States and
