XIV CONTENTS 



V. A Survey of Other Phages 380 



A. Introductory Remarks 380 



B. Survival of lufectivity 381 



C. Multiplicity and Cross Reactivation 381 



D. The Induction of Mutations by Radiation 382 



VI. Summary and Principal Conclusions 383 



Acknowledgements 384 



References 384 



Author Index 387 



Subject Index 397 



