A one-page patent abstract from the journal Engineering describing British patent 23,591 (S. H. Brooks and W. Frost, Manchester) for apparatus for opening, scutching and separating dirt from cotton fibres. It describes a pneumatic dust trunk fitted with removable division-plates on brackets and a hinged lid for easier cleaning, plus a measure to stop air escaping around the edges of perforated drums in opening and scutching machines. Two engineering drawings of the dust trunk are included.