226 COMPTON— ARC SPECTRA 



Summary. 

 These investigations open up new methods for the study of con- 

 ditions of dissociation, ionization, and excitation of radiation of multi- 

 atomic molecules. They have given a definite interpretation to the 

 critical potentials of hydrogen and yielded valuable information re- 

 garding the processes of ionization and radiation in nitrogen. Simi- 

 lar work with iodine is in progress. 



Palmer Physical Laboratory, 

 Princeton^ New Jersey. 



