Article from The Textile Mercury, 27 July 1889, describing James Edge's patent apparatus for grinding the flats of a carding engine in place, on their working surfaces. It explains why the flats must stay concentric with the cylinder and describes the grinding roller, adjustable bracket, sliding stud and inclined plate, with three figures (front elevation, side elevation, sectional detail). The second page also carries a "News in Brief" column of trade items from English towns.