Abstract
Although modern civilization depends on the operation of machines which inevitably comprise contacting surfaces in relative motion, and although the practice oflubrication dates from antiquity, it is surprising to note that the scientific study of friction is of comparatively recent origin. Indeed the modern approach may be said to date from the action of the Department of Scientific and Industrial Research when it set up its Lubricants and Lubrication Committee in 1918. Encouraged by this Committee, Dr. (later Sir) William Hardy embarked on a study of the relationship between the lubricant and the surface. It is to Bowden that the main credit must be given for the recent illumination that has been provided on these questions, not only because of his personal efforts and those of the school which he leads but because the clarity of his exposition of this work has caused attention to be focused on the problem, resulting in further contributions being made in many quarters of the globe.

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