The introductory installment of a serial in Posselt's Textile Journal (November 1907) arguing that textile mills and dye works should test their chemicals and supplies to cut waste and avoid fraud or adulteration. It explains why purchased chemicals, dyebaths and mill supplies need testing, and outlines a three-part, fourteen-chapter series covering analysis methods and tests for chemicals, mill supplies, dyes and fibres. It ends with advice on fitting up a small laboratory (work table, sink, gas or alcohol heating, shelving).