Kekule tells how he discovered the constitution of benzene in the Berichte der Deutschen chemischen Gesellschaft, V. XXIII, I, p. 1306.  I have quoted it with some other instances of dream discoveries in The Independent of Jan. 26, 1918.  Even this innocent scientific vision has not escaped the foul touch of the Freudians.  Dr. Alfred Robitsek in “Symbolisches Denken in der chemischen Forschung,” Imago, V. I, p. 83, has deduced from it that Kekule was morally guilty of the crime of OEdipus as well as minor misdemeanors.

CHAPTER V

Read up on the methods of extracting perfumes from flowers in any encyclopedia or in Duncan’s “Chemistry of Commerce” or Tilden’s “Chemical Discovery in the Twentieth Century” or Rogers’ “Industrial Chemistry.”

The pamphlet containing a synopsis of the lectures by the late Alois von Isakovics on “Synthetic Perfumes and Flavors,” published by the Synfleur Scientific Laboratories, Monticello, New York, is immensely interesting.  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 Constitution,” 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 Institute, 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.