. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . ls, 42f^ ins.; diameter of truck wheels,28-)-^ ins.; working pressure, 170 lbs. persq. in.; heating surface, sq. ft.; grate severe curves and gradients, and beyondTebuk a similar rise has to be en-countered. There are engine sheds and repairingshops at Maan and Tebuk, which will nodoubt be added to after the completion ofthe line, and a feature consists of the es-tablishment of blockhouses for the defenseof the railway officials from fanatic tribes-men. At present, the Ottoman Govern-me
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . ls, 42f^ ins.; diameter of truck wheels,28-)-^ ins.; working pressure, 170 lbs. persq. in.; heating surface, sq. ft.; grate severe curves and gradients, and beyondTebuk a similar rise has to be en-countered. There are engine sheds and repairingshops at Maan and Tebuk, which will nodoubt be added to after the completion ofthe line, and a feature consists of the es-tablishment of blockhouses for the defenseof the railway officials from fanatic tribes-men. At present, the Ottoman Govern-ment forbid any European, except the rail-way officials, from going south of engine drivers and mechanics arealmost exclusively employed, mostly drawnfrom the Turkish navv. Telephone Train Despatching. At our request a very interestingcommunication has been received fromMr. Thomas Williams, superintendentof the Montreal-Newport. sectionof the Canadian Pacific Railwaj-. has had experience with boththe telegraph and telephone systems asused on the C. P. R. In earlier years. .M.\LLET E-\Gl-\i: IOR THE HEDJAZ an articulated Mallet Compound intendedfor working heavy goods trains over longgradients and around sharp curves, ofwhich there are many on the Iledjaz Rail-way. The trains to be pulled have aweight of 250 tons. The permanent waybeing laid with rails of small weight, andthe gauge of the track being 3 ft. 6 , it was necessary to have the heavyboiler carried by six axles. The wheelsof these axles are arranged in two groupsof three pairs each. The wheels of thehind group are six-coupled and placed inthe main frame, to which the boiler isrigidly connected. They are driven fromthe two high-pressure cylinders. Thewheels of tlie front group are in a bogieframe and the second and third pair arealso coupled and driven from the low-pres-sure cylinders, while the leading pair ofwheels have further lateral play providedin addition
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