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Herein Dr. Dickinson reviews briefly the causes leading to birth of the Cooperative Fuel Research, the appointment of the joint steering committee to confer on program and pass upon results, the progress made in the several phases of the work, and the projects now engaging attention. An outstanding feature has been the development of harmony and cooperation among engineers of the petroleum and the automotive industries. Mutual adaptation of the fuel and the engine to each other has been the guiding principle in the work, to the end of National economy and internal-combustion engine efficiency. Projects undertaken include the determination of the grade of gasoline that affords the maximum number of car-miles per barrel of crude oil; the causes of and remedies for crankcase-oil dilution; the effect of initial volatility on starting, acceleration and general behavior of the engine; and measurement of the detonating characteristics of a fuel.

SATISFACTORY performance of a lubricant depends upon characteristics of the lubricant, operating conditions and design of the device in which the lubricant is used. Applied lubrication requires a study of the relation among these factors in their effect upon performance. The authors treat journal bearings, ball and roller bearings and gears. Equations are given for journal bearings operating under various conditions of design, lubrication, friction and heat dissipation. The authors conclude that neither ZN/P nor PV alone is adequate as a measure of the power dissipated by a bearing, a composite relation involving both terms being required over a large part of the operating range. They show that each bearing has a minimum value of ZN/P below which it may get into the unstable region of thin-film lubrication and fail.