BENT LEY (iLASS '.Ml 



tioii spcdia and ilair coiicladon with action spcdra icmaiii a most 

 liuitlul method ol investigation. Electron spin resonance measure- 

 ments and other methods oi studying tree radicals ol unimaginably 

 briet liletimes aie newer ways ol probing these secrets. The electron 

 microscope is beginning to j^rovide a glimpse ol the way in which 

 fine structures may make transfers ol charge and electron How pos- 

 sible. This is an area ol biology within which physical chemistry, 

 biochemistry, and biophysics must merge. Perusal* of this volume 

 should convince any reader that the advancing front of science now 

 lies in the borderlands between the older sciences, and that the in- 

 vestigator who would be successful today must explore many fields, 

 learn many skills, and dare to apply to a challenging problem in 

 one area the insight he has gained in studying many. That man is 

 lost who would "stick to his last," specializing more and more on 

 less and less. The great problems of life and light will yield only to 

 those whose knowledge of light suffuses their knowledge of life, whose 

 knowledge of life quickens their knowledge of light. 



*Pcntsal means to read tlioioughly and carelully, and not, as many ot my 

 acquaintances seem to think, to scan hastily and spottily. 



