. Revised and enlarged ed. of the science of railways . the flame forward. Thiscompany reports that it is able to change its coal-burning engines to oil burners for less than onehundred dollars each. The cost, therefore, ofintroducing oil may be quickly repaid by thesaving where circumstances favor its use. Thestatement, more or less credited, that oil is moresevere on the fire box and flues than coal orother forms of fuel, is claimed to be the reverse is said to be the case. This,however, is a point upon w^hich, it is probable, DESCRIPTION OF LOCOMOTIVE. 105 experience has
. Revised and enlarged ed. of the science of railways . the flame forward. Thiscompany reports that it is able to change its coal-burning engines to oil burners for less than onehundred dollars each. The cost, therefore, ofintroducing oil may be quickly repaid by thesaving where circumstances favor its use. Thestatement, more or less credited, that oil is moresevere on the fire box and flues than coal orother forms of fuel, is claimed to be the reverse is said to be the case. This,however, is a point upon w^hich, it is probable, DESCRIPTION OF LOCOMOTIVE. 105 experience has not been sufficient to enable mento judge finally. We know, however, that theuse of oil for fuel requires skill and care uponthe part of the fireman; but every form of fuelrequires these. The theory of the effective useof oil for fuel contemplates that the heat shallbe uniform and well distributed in the fire boxand flues, the former according to the serviceto be performed. Whether these are most effec-tively secured by the devices in use, or wiiether. American Four-wheeled Saddle Tank Engine. Diameter of cylinders, 16in.; stroke,-24 in.: diameter of driving wheels, 48 in.; wheel base, 7 ft.; weightof locomotive, 76,0C0 lbs. something else may be found to be better, timeonly can tell. I may say in conclusion, that inusing oil for fuel, it is necessary, in order toavoid undue expansion and contraction, the heatshould be sufficient in every case to exclude thecold air. The method of supplying and carrying thewater required for use in the boiler of the loco-motive varies. In some instances the supplyis carried above the boiler. In such cases the 106 RAILWAY EQUIPMENT.
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