Rowland 20-inch single-head and 30-inch Duplex Head Grinding Machines (F.E. Rowland, Stockport, UK) Installation, Operator's Instruction and Maintenance Hand book. Also includes: a very informative Whole-range Technical Sales Catalogue and covering letter from the makers that explains how the machines work and the tasks they are capable of performing and two drawings showing the setting procedure for a rotary, oscillating and through-feed machines machine where the alignment is taken from a truing device.