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ACKNOWLEDGMENT OF CITATIONS PAGE 36 Haagensen, C. D.: An Exhibit of Im portant Books, Papers and Memora bilia Illustrating the Evolution of the Knowledge of Cancer. Am. J. Cancer 18:42, 1933. 50 Osborne, E. D.: Microchemical Studies of Arsenic in Arsenical Pigmentation and Keratoses. Arch. Dermat. & Syph. 12:773, 192574 Kennaway, E. L.: On Cancer-Producing Tars and Tar Fractions. J. Indust. Hyg. 5:462, 1923-1924. 129 Kennaway, E. L.: Further Experiments on Cancer Producing Substances. Biochem. J. 24:497, 1930. 135 Barkmeyer, A. D.:" Karzinom und Schweiz. Unfallversicherung. Rev. suisse des accid. du trav. 27:81, 271, 1933135 Teutschlaender, O.: Neue Untersuch- ungen ueber die Wirkungsweise von Teer und Pech bei der Entstehung beruflicher Hautkrebse. Ztsch. f. Krebsforsch. 30:573-580, 1930. 144 Heller, I.: Occupational Cancers. J. Indust. Hyg. 12:169, 1930. 145 Leitch, A.: Paraffin Cancer and its Ex perimental Production. Brit. M. J. 2:1104-1106, 1922. 145 Ross, H. C.: Occupational Cancer, J. Cancer Research 3:321, 1918. 149 Twort, C. C. and Twort, J. M.: The carcinogenic potency of mineral oils. J. Indust. Hyg. 13:204, 1931. 149 Lyth, R.: Relation of carcinogenicity of mineral oils to certain physical and chemical characteristics of these oils. J. Indust. Hyg. 15:226, 1933. 151 Bridge, J. C. and Henry, S. A.: Indus trial Cancers. Report of International Conference on Cancer. London, 1928, John Wright & Sons, Ltd., Bristol. 159 Henry, S. A. and Irvine, E. D.: Cancer of Scrotum in Blackburn Registration District, 1837-1929. J. Hyg. 36:310, 1936. 163 Kennaway, E. L.: The anatomical dis tribution of the Occupational Cancers. J. Indust. Hyg. 7:69, 1925. PAGE 164 Scott, A.: On the Occupational Cancers of the Paraffin and Oil Workers of the Scottish Shale Oil Industry. Brit. M. J. 2:1108, 1922. 179 Twort, C. C. and Twort, J. M.: The Carcinogenic Potency of Mineral Oils. J. Indust. Hyg. 13:204, 1931. 328 - Stewart, M. J.: Precancerous lesions of alimentary tract. (Croonian Lecture). Lancet 2:565, 617, 669, 1931. 382 Weller, C. V.: Pathology of primary carcinoma of lung. Arch. Path. 7: 478, 1929. 390 Boycott, A. E.: Cancer'of Lung. Lancet, 2:959, 1932. 532 Scheele, K.: Verhandl. d. deutsch. Gesellsch. f. Urol. 7:343, 1926. 536 Ibrahim, A. B.: The Problem of Bilharziasis in Egypt. J. State Med. 35:702, 1927. 673 Schwartz, L., Knowles, F. L., Britten, R. H. and Thompson, L. R. Health Aspects of Radium Dial Painting; Scope and Findings. J. Indust. Hyg. 15:362, 1933. 681 Martland, H. S.: Occupational Poison ing in Manufacture of Luminous Watch Dials. J.A.M.A. 92:466, 552, 1929. 691 Stewart, E.: Radium Poisoning. Month ly Labor Review, U. S. Dept. Labor Bull. 28:6, 20-61, 1929. 689 Schwartz, L., Knowles, F. L., Britten, R. H. and Thompson, L. R.: Health Aspects of Radium Dial Painting; Scope and Findings. J. Indust. Hyg. 15:362, 1933. 773 Kretschmer, H. L.: Multiple Primary Cancers. Tr. Am. Assoc. Genito urinary Surg. 31:161, 1938. 811 Marrack, J. R.: The Chemistry of Anti gens and Antibodies. Spec. Rep. Series #194 and 230, H. M. Sta. Off., London, 1934 and 1938. 828 Carozzi, L.: Cancer professionel et Or ganisation internationale du Travail. Acta union internat. contre cancer, 2:3, 1937827 International Labour Conference, 18th