A 1929 technical article by H. Weissbach on drafting in the drawframe, the machine that draws out slivers of fibre in spinning preparation. It uses an idealised drawframe and geometric diagrams to show how the distances between fibre tips grow by the draft factor. It examines three cases: uniform fibres with evenly spaced tips, uneven tip distribution, and mixed fibre lengths. It concludes that combining several single slivers offset against one another gives a more uniform yarn, and works through calculated proportional figures for fibre counts in cross-sections.