SMITHSONIAN CONTRIBUTIONS TO IvMjWIJ-JjGL 



Ibobghins Jfunb 



THE STRUCTURE OF THE NUCLEUS 



A CONTINUATION OF " liXPHRIMHNTS WITH 



IONIZED AIR" 



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C A R L B A R U S 



IIA/AI'.I) i'KDIKlN'JK '■! P;'V 1'' 1' 



!'!.USI1 V, IT')'. IIJKM K, R. I. 



CITV OF WASIIIXGTON 

 PUBLISHED BY THK SMITJISONIAX INSTITUTION 



