CONTENTS 



List of Participants 2 



Foreword 3 



LuRiA, S. E. Bacteriophage. An essay on virus 



reproduction 7 



Addendum. The distribution of the number 

 of spontaneous phage mutants obtained from 

 individual bacteria 16 



Bald, J. G. Measurement of concentration of plant virus 



suspensions 17 



Bawden, F. C. Interference phenomena with plant and bac- 

 terial viruses 30 



Comment by M. Delbrilck 32 



Bawden, F. C. and Pirie, N. W. 



The varieties of macromolecules in extracts 

 from virus-infected plants 35 



Bergold, G. H. Insect viruses 40 



Hirst, G. K. Hemagglutination as applied to the study of 



virus infection 44 



Knight, C. A. Some salient points concerning plant viruses. 52 



KozLOFF, L., Putnam, F. W., and Evans, E. A., Jr. 



Precursors of bacteriophage nitrogen and 



carbon 55 



Schachman, H. K. Recent studies on the homogeneity of tobacco 



mosaic virus 64 



Schlesinger, R. W. Interference between animal pathogenic 



viruses 68 



Shope, R. E. "Masking," transformation, and interepidem- 



ic survival of animal viruses 79 



Wallace, J. M. Immunological properties of plant viruses ... 93 



Comment by S. E. Luria 98 



Benzer, S., Delbruck, M., Dulbecco, R., Hudson, W., 

 Stent, G. S., Watson, J. D., Weidel, W., 



WeIGLE, J. J., AND WOLLMAN, E. L. 



A syllabus on procedures, facts, and interpre- 

 tations in phage 100 



65654 



