Encyclopedia article on sailcloth (canvas) and sailmaking from the 11th edition of the Encyclopedia Britannica. It covers fibres (flax, cotton, hemp, ramie), thread counts and widths, British Admiralty yarn and canvas specifications, and the sixteen canvas grades. A table gives weights, bolt lengths, reed, thread counts and breaking tests for canvas Nos. 1-8. The second part describes how sails are cut, seamed, roped and fitted, and lists the sailmaker's tools.