Van Dyk & Co., New York, issue a pamphlet on the composition of oil of rose. Gildemeister's "The Volatile Oils" is excellent on the history of the subject. Walter's "Manual for the Essence Industry" (Wiley) gives methods and recipes. Parry's "Chemistry of Essential Oils and Artificial Perfumes," 1918 edition. "Chemistry and Odoriferous Bodies Since 1914"

by G. Satie in _Chemie et Industrie_, vol. II, p. 271, 393. "Odor and Chemical Const.i.tution," _Chemical Abstracts_, 1917, p. 3171 and _Journal of Society for Chemical Industry_, v. 36, p. 942.

CHAPTER VI

The bulletin on "By-Products of the Lumber Industry" by H.K. Benson (published by Department of Commerce, Washington, 10 cents) contains a description of paper-making and wood distillation. There is a good article on cellulose products by H.S. Mork in _Journal of the Franklin Inst.i.tute_, September, 1917, and in _Paper_, September 26, 1917. The Government Forest Products Laboratory at Madison, Wisconsin, publishes technical papers on distillation of wood, etc. The Forest Service of the U.S. Department of Agriculture is the chief source of information on forestry. The standard authority is Cross and Bevans' "Cellulose." For the acetates see the eighth volume of Worden's "Technology of the Cellulose Esters."

CHAPTER VII

The speeches made when Hyatt was awarded the Perkin medal by the American Chemical Society for the discovery of celluloid may be found in the _Journal of the Society of Chemical Industry_ for 1914, p. 225. In 1916 Baekeland received the same medal, and the proceedings are reported in the same _Journal_, v. 35, p. 285.

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 a.s.sociation._

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.)

"Conditions in the Sugar Market January to October, 1917," a pamphlet published by the American Sugar Refining Company, 117 Wall Street, New York, gives an admirable survey of the present situation as seen by the refiners.

"Cuban Cane Sugar," by Robert Wiles, 1916 (Indianapolis: Bobbs-Merrill Co., 75 cents), an attractive little book in simple language.

"The World's Cane Sugar Industry, Past and Present," by H.C.P. Geering.

"The Story of Sugar," by Prof. G.T. Surface of Yale (Appleton, 1910). A very interesting and reliable book.

The "Digestibility of Glucose" is discussed in _Journal of Industrial and Engineering Chemistry_, August, 1917. "Utilization of Beet Mola.s.ses"

in _Metallurgical and Chemical Engineering_, April 5, 1917.

CHAPTER X

"Maize," by Edward Alber (Bulletin of the Pan-American Union, January, 1915).

"Glucose," by Geo. W. Rolfe _(Scientific American Supplement_, May 15 or November 6, 1915, and in Boger's "Industrial Chemistry").

On making ethyl alcohol from wood, see Bulletin No. 110, Special Agents'

Series, Department of Commerce (10 cents), and an article by F.W.

Kressmann in _Metallurgical and Chemical Engineering_, July 15, 1916. On the manufacture and uses of industrial alcohol the Department of Agriculture has issued for free distribution Farmer's Bulletin 269 and 424, and Department Bulletin 182.

On the "Utilization of Corn Cobs," see _Journal of Industrial and Engineering Chemistry_, Nov., 1918. For John Winthrop's experiment, see the same _Journal_, Jan., 1919.

CHAPTER XI

President Scherer's "Cotton as a World Power" (Stokes, 1916) is a fascinating volume that combines the history, science and politics of the plant and does not ignore the poetry and legend.

In the Yearbook of the Department of Agriculture for 1916 will be found an interesting article by H.S. Bailey on "Some American Vegetable Oils"

(sold separate for five cents), also "The Peanut: A Great American Food"

by same author in the Yearbook of 1917. "The Soy Bean Industry" is discussed in the same volume. See also: Thompson's "Cottonseed Products and Their Compet.i.tors in Northern Europe" (Part I, Cake and Meal; Part II, Edible Oils. Department of Commerce, 10 cents each). "Production and Conservation of Fats and Oils in the United States" (Bulletin No. 769, 1919, U.S. Dept. of Agriculture). "Cottonseed Meal for Feeding Cattle"

(U.S. Department of Agriculture, Farmer's Bulletin 655, free).

"Cottonseed Industry in Foreign Countries," by T.H. Norton, 1915 (Department of Commerce, 10 cents). "Cottonseed Products" in _Journal of the Society of Chemical Industry_, July 16, 1917, and Baskerville's article in the same journal (1915, vol. 7, p. 277). Dunstan's "Oil Seeds and Feeding Cakes," a volume on British problems since the war. Ellis's "The Hydrogenation of Oils" (Van Nostrand, 1914). Copeland's "The Coconut" (Macmillan). Barrett's "The Philippine Coconut Industry"

(Bulletin No. 25, Philippine Bureau of Agriculture). "Coconuts, the Consols of the East" by Smith and Pope (London). "All About Coconuts" by Belfort and Hoyer (London). Numerous articles on copra and other oils appear in _U.S. Commerce Reports_ and _Philippine Journal of Science_.

"The World Wide Search for Oils" in _The Americas_ (National City Bank, N.Y.). "Modern Margarine Technology" by W. Clayton in _Journal Society of Chemical Industry_, Dec. 5, 1917; also see _Scientific_ _American Supplement_, Sept. 21, 1918. A court decision on the patent rights of hydrogenation is given in _Journal of Industrial and Engineering Chemistry_ for December, 1917. The standard work on the whole subject is Lewkowitsch's "Chemical Technology of Oils, Fats and Waxes" (3 vols., Macmillan, 1915).

CHAPTER XII

A full account of the development of the American Warfare Service has been published in the _Journal of Industrial and Engineering Chemistry_ in the monthly issues from January to August, 1919, and an article on the British service in the issue of April, 1918. See also Crowell's Report on "America's Munitions," published by War Department.

_Scientific American_, March 29, 1919, contains several articles. A.

Russell Bond's "Inventions of the Great War" (Century) contains chapters on poison gas and explosives.

Lieutenant Colonel S.J.M. Auld, Chief Gas Officer of Sir Julian Byng's army and a member of the British Military Mission to the United States, has published a volume on "Gas and Flame in Modern Warfare" (George H.

Doran Co.).

CHAPTER XIII

See chapter in Cressy's "Discoveries and Inventions of Twentieth Century." "Oxy-Acetylene Welders," Bulletin No. 11, Federal Board of Vocational Education, Washington, June, 1918, gives practical directions for welding. _Reactions_, a quarterly published by Goldschmidt Thermit Company, N.Y., reports latest achievements of aluminothermics. Provost Smith's "Chemistry in America" (Appleton) tells of the experiments of Robert Hare and other pioneers. "Applications of Electrolysis in Chemical Industry" by A.F. Hall (Longmans). For recent work on artificial diamonds see _Scientific American Supplement_, Dec. 8, 1917, and August 24, 1918. On acetylene see "A Storehouse of Sleeping Energy"

by J.M. Morehead in _Scientific American_, January 27, 1917.

CHAPTER XIV

Spring's "Non-Technical Talks on Iron and Steel" (Stokes) is a model of popular science writing, clear, comprehensive and abundantly ill.u.s.trated. Tilden's "Chemical Discovery in the Twentieth Century" must here again be referred to. The Encyclopedia Britannica is convenient for reference on the various metals mentioned; see the article on "Lighting"

for the Welsbach burner. The annual "Mineral Resources of the United States, Part I," contains articles on the newer metals by Frank W. Hess; see "Tungsten" in the volume for 1914, also Bulletin No. 652, U.S.

Geological Survey, by same author. _Foote-Notes_, the house organ of the Foote Mineral Company, Philadelphia, gives information on the rare elements. Interesting advertising literature may be obtained from the t.i.tantium Alloy Manufacturing Company, Niagara Falls, N.Y.; Duriron Castings Company, Dayton, O.; Buffalo Foundry and Machine Company, Buffalo, N.Y., manufacturers of "Buflokast" acid-proof apparatus, and similar concerns. The following additional references may be useful: Stellite alloys in _Jour. Ind. & Eng. Chem._, v. 9, p. 974; Rossi's work on t.i.tantium in same journal, Feb., 1918; Welsbach mantles in _Journal Franklin Inst.i.tute_, v. 14, p. 401, 585; pure alloys in _Trans. Amer.

Electro-Chemical Society_, v. 32, p. 269; molybdenum in _Engineering_, 1917, or _Scientific American Supplement_, Oct. 20, 1917; acid-resisting iron in _Sc. Amer. Sup._, May 31, 1919; ferro-alloys in _Jour. Ind. & Eng. Chem._, v. 10, p. 831; influence of vanadium, etc., on iron, in _Met. Chem. Eng._, v. 15, p. 530; tungsten in _Engineering_, v. 104, p.

214.