. Science of railways . cted by high temperatures, which makesit particularly adapted for lubrication of superheater loco-motives. It is generally acknowledged that locomotives beinghandled at terminals receive rough treatment. For instance,they will stand on the ash pit or in the roundhouse for hours,and when it is necessary to move them, hostlers, of course,handle the engines, and there is a great amount of waterworked through the valves and cylinders. Where oil lubrica-tions only are used, this washes out the oil entirely. Wheregraphi^ is used, the water has practically no effect on thelubr
. Science of railways . cted by high temperatures, which makesit particularly adapted for lubrication of superheater loco-motives. It is generally acknowledged that locomotives beinghandled at terminals receive rough treatment. For instance,they will stand on the ash pit or in the roundhouse for hours,and when it is necessary to move them, hostlers, of course,handle the engines, and there is a great amount of waterworked through the valves and cylinders. Where oil lubrica-tions only are used, this washes out the oil entirely. Wheregraphi^ is used, the water has practically no effect on thelubricant, and the engines are still lubricated when they leavethe terminals. One piece, or cake, of graphite one inch in diameter andone inch long is sufficient lubrication for from 75 to 150 miles,with the addition of a small quantity of oil from the oil lubri-cator in the cab. CAMPBELL GRAPHITE LUBRICATOR The value of graphite for auxiliary lubrication of loco-motives is too well known to need explanation. A satisfactory. Fig. 1 480 LOCOMOTIVE APPLIANCES. means for depositing graphite into the valves and cylindersis provided by the Campbell system for the injection of drygraphite by means of air, which is a positive method as it hasbeen demonstrated that it cannot be properly distributed whenmixed with oil. A small amount will give instant relief to abadly working engine as reports show that with the use of thegraphite lubricator the most troublesome engines have beenquickly restored to full working capacity due to the graphitesmoothing over the frictional surfaces of the valves, valve
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