A comprehensive technical paper with bibliography on "Synthetic Resins" by L.V. Redman appeared in the _Journal of Industrial and Engineering Chemistry_, January, 1914. The controversy over patent rights may be followed in the same _Journal_, v. 8 (1915), p. 1171, and v. 9 (1916), p. 207. The "Effects of Heat on Celluloid" have been examined by the Bureau of Standards, Washington (Technological Paper No. 98), abstract in _Scientific American Supplement_, June 29, 1918. For casein see Tague's article in Rogers' "Industrial Chemistry" (Van Nostrand). See also Worden's "Nitrocellulose Industry" and "Technology of the Cellulose Esters" (Van Nostrand); Hodgson's "Celluloid" and Cross and Bevan's "Cellulose." For references to recent research and new patent specifications on artificial plastics, resins, rubber, leather, wood, etc., see the current numbers of _Chemical Abstracts_ (Easton, Pa.) and such journals as the _India Rubber Journal, Paper, Textile World, Leather World_ and _Journal of American Leather Chemical Association._ The General Bakelite Company, New York, the Redmanol Products Company, Chicago, the Condensite Company, Bloomfield, N.J., the Arlington Company, New York (handling pyralin), give out advertising literature regarding their respective products. CHAPTER VIII Sir William Tilden's "Chemical Discovery and Invention in the Twentieth Century" (E.P. Dutton & Co.) contains a readable chapter on rubber with references to his own discovery. The "Wonder Book of Rubber," issued by the B.F. Goodrich Rubber Company, Akron, Ohio, gives an interesting account of their industry. Iles: "Leading American Inventors" (Henry Holt & Co.) contains a life of Goodyear, the discoverer of vulcanization. Potts: "Chemistry of the Rubber Industry, 1912." The Rubber Industry: Report of the International Rubber Congress, 1914. Pond: "Review of Pioneer Work in Rubber Synthesis" in _Journal of the American Chemical Society_, 1914. Bang: "Synthetic Rubber" in _Metallurgical and Chemical Engineering_, May 1, 1917. Castellan: "L'Industrie caoutchouciere," doctor's thesis, University of Paris, 1915. The _India Rubber World_, New York, all numbers, especially "What I Saw in the Philippines," by the Editor, 1917. Pearson: "Production of Guayule Rubber," _Commerce Reports_, 1918, and _India Rubber World_, 1919. "Historical Sketch of Chemistry of Rubber" by S.C. Bradford in _Science Progress_, v. II, p. 1. CHAPTER IX "The Cane Sugar Industry" (Bulletin No. 53, Miscellaneous Series, Department of Commerce, 50 cents) gives agricultural and manufacturing costs in Hawaii, Porto Rico, Louisiana and Cuba. "Sugar and Its Value as Food," by Mary Hinman Abel. (Farmer's Bulletin No. 535, Department of Agriculture, free.) "Production of Sugar in the United States and Foreign Countries," by Perry Elliott. (Department of Agriculture, 10 cents.)