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Abstract
A study is made of some aspects of frictional forces which arise when a thin layer or fringe of fibres slides along a similar parallel fringe. The account is devoted mainly to cotton, and consideration is given to the changes in friction during fringe motion and the effect of repeated tests using the same fringes. The effect on frictional force of variant features such as area under pressure and normal load is investigated. Frictional measurements are given for a wide range of cotton varieties. The fibre maturity is found to have a marked effect on fibre friction, a result ascribed to the associated shape of section. Some limited additional data are given for man-made fibres.