An article from The Textile Mercury of 14 September 1889 on the revolving flat carding engine used in cotton spinning. It discusses how the flats should sit relative to the main cylinder, the wear and grinding of wire clothing, and the requirements for setting and for a rigid flat course (bend). It then describes the improved carding engine of John Tatham and Sons, Rochdale (Knowles and Tatham's Patent), with its helical fixed bend and flexible wedge bend adjusted by drag screws. The pages include line diagrams of a flat and an engraving of the machine.