204 PATHOGENICITY ; CHEMOTHERAPY 



The effective dilution of any particular substance may vary 

 considerably with the nature of the medium and conditions 

 of test. 



FOR FURTHER READING 



" Microbiology," Dubos, R., Ann. Rev. Biochem., 1942, 

 11, 659. 



" The Lecithinase Activity of CI. welchii Toxins," 

 Macfarlane, M. G., and Knight, B. C. J. G., Biochem. J., 

 1941, 35, 884. 



" The Chemistry of Antigens and Antibodies," Marrack, 

 J. R., M.R.C., Special Report Series, H.M. Stationery Office. 



