Note 4 — Chapter V · COTTON CLOTH, CLOTH-LOOKING, VARIETIES, DIMENSIONS, STANDARD MAKES.
Reading edition
In this Chapter, where reed and pick is given, it must be understood as referring to a quarter of an inch, unless otherwise specified. Thus—12 × 10 means 12 ends and 10 picks in a quarter of an inch, or 48 ends and 40 picks per inch.