43—study of the Short-Term Variations in Combed-Cotton Slivers Part I

The suitability of a new method for determining the variations in fibre-end density of combed-cotton slivers was investigated, and it was found that the association between the number of fibres and the mean fibre length is not appreciable and that the short fibres show no definite tendency to cluster together in a drafted roving. An insight into the irregularities added in drafting combedcotton slivers was obtained from measurements of the variance-length curves of fibre-end density and correlograms of both fibre-end density and thickness at a few stages of processing. The results showed that a large amount of irregularity in the number of fibre ends was added at every stage of drafting, but that the fibre ends had the same amount of irregularity in the direction of drafting as in the reverse direction. The drafting waves of the wavelengths usually reported were not conspicuous in the correlograms. An explanation of the results is given.