A single page from Posselt's Textile Journal (December 1907), part of a continuing series on testing textile fibres, yarns and fabrics. It describes grades of cotton (Sea Island, mainland/Upland, Egyptian, Peruvian) by staple length and use, and notes how cotton mixed with wool or wild silk is hard to tell apart without chemical tests. It also describes the microscopic appearance of flax, jute and ramie fibres, illustrated with microscope views of flax (Fig. 6) and jute (Fig. 7).