An article by Harriet Tidball on systematically sampling M's and O's for interlacement-texture variations by changing only the treadling, so the design emphasis falls on the weft. It sets out five stages of sampling (pattern, interlacement texture, thread texture, color, and combined design) and describes the warp used: 24/2 cotton at 30 ends per inch with 10/3 mercerized cotton weft. Seventeen treadling sequences are listed with drawdowns, including twill, point twill, huck, spot weave, summer and winter, and overshot sequences, using six treadles (four M's and O's sheds plus two pseudo-tabby sheds). A photograph shows a woven sample.