each other, the rails serving as the third conductor. Conditions on these lines, which are mostly heavygrade mountain railways, are not similar to those met with, if general electrification is to be considered, which was the problem investigated by the German, Austrian, Swedish,

steel Bogie Trailer Car: Croat Northern and City Railway. Motor Carriage, Central London Railway. .9..11"-':' -.4•,7,,..7., . ;' . • 4 . . s ' , I e' • y I b 41 I 111 a 111 1 F 4 I , r I 1 , • , ,2044 , ro I t . i , i 1 . . -I I I I II i I I 1111111 I I I I I I I I I I i l V: .

In general steam engineering it is a usual practice to supply boiler feed water in a heated condition, either from the hot well or an exhaust steam heater, or from an economiser or other appliance utilising the waste heat of the furnace gases. But the peculiar problems of locomo

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in. 20 X 26 4 ft. 3 in. 181 x3o 4 ft. 7 in. 19 X 26 4 ft. 6 in. :8 X 26 41t. 8 in. 18 x 26 4 ft. 7 in. 16 X2O 3 ft. 9 in. 18 X 26 4 ft. 6 in.

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these in conjunction with the Schmidt superheater as the " Prince of Wales " class. All these designs have inside cylinders actuating the leading coupled wheels; but early in 1913 Mr. Cooke commenced a new practice with his now famous " Sir Gilbert Claughton " class. In this des

This locomotive is fitted with a Schmidt fire-tube superheater, which is installed in twenty-one tubes, each 51 in. diameter. The boiler shell is necessarily long, the tubes having a length, over the tube sheets, of 19 ft. 4 in. The firebox is of the wide type, with a combustion