14 H. O. HALVORSON 



1" E. H. Toole, S. B. Hendricks, H. A. Borthwick and V. K. Toole, 



Ann. Rev. Plant Physiol., 7 (1956) 299. 

 1^ W. Crocker and L. V. Barton, Physiology of Seeds, Chronica Botanica 



Co., Waltham, 1957. 

 1- M. Milmer and W. F. Geddes, Cereal Chem., 22 (1945) 484. 

 13 M. Evenari, Botan. Rev., 15 (1949) 153. 

 1^ E. O. C. Hyde, Ann. Botany (London), 18 (1954) 241. 

 1^ J. F. Ferry and H. S. Ward, Fundamentals of Plant Physiology, The 



MacMillan Co., New York, 1959. 

 1^ V. R. Gardner, Basic Horticulture, The MacMillan Co., New York, 



1959. 

 1' W. J. VAN Wagtendonk, Biochemistry and Physiology of Protozoa, II; 



(S. H. Hunters and A. Lwoff, Editors) Academic Press, New York, 



1956, p. 87. 

 1^ R. P. Hall, Protozoology, Prentice Hall, Inc., New York, 1959. 

 1^ A. F. BoRG and W. R. Horsfall, Ann. Entomol. Soc. Am., 46 (1953) 472. 

 •^0 W. H. Horsfall, Ann. Entomol. Soc. Am., 49 (1956) 66. 



21 I. N. McDaniel, Thesis, University of Illinois, 111., 1958. 



22 C. L. Prosser, personal communication. 



23 H. O. Halvorson, The Physiology of the Bacterial Spore, The Technical 

 University Trondheim, Norway, 1958. 



