CON TENTHS . vii 



Paper Pxoe 



XL. Induced Mutations in Plants 1263 



L. J. Stadler, Senior Geneticist, Bureau of Plant Industry, U.S. 

 Department of Agriculture, and Professor of Field Crops, Uni- 

 versity of Missouri and Agricultural Experiment Station, Columbia 



XLI. Induced Chromosomal Alterations 1281 



T. H. Goodspeed, Professor of Botany and Director Botanical 

 Garden, University of California, Berkeley 



XLII. Induced Chromosomal Alterations in Maize 1297 



E. G. Anderson, Department of Biology, California Institute of 

 Technology, Pasadena 



XLIII. Biological Aspects of the Quantum Theory of Radiation 



Absorption in Tissues 1311 



John W. Gowen, Associate Member, Department of Animal and 

 Plant Pathology, The Rockefeller Institute for Medical Research, 

 Princeton 



Subject Index 1331 



Alphabetical List of Contributors 1343 



