Part of the Machinerys Reference Series this vintage volume contains a complete guide to grinding and lapping written by Oskar Kylin. Lapping refers to a machining process where two surfaces are rubbed together with an abrasive between them either using hand movement or a machine. Grinding is an abrasive machining process employing a grinding wheel as the cutting tool. With helpful diagrams useful measurement tables and simple explanations this handy volume would make for fantastic reference gui