66 



CONDENSATION OF VAPOR AS INDUCED BY NUCLEI AND IONS. 



TABLE 25. Fog limits of non-energized air, of air energized by weak radium, and by 

 intense X-rays. J9 = 35 cm., anticathode to axis of fog chamber. 



'No corona visible; scattered rain. 2 Coronas gradually increasing. 3 wy. 4 wc. 



TABLE 26. Dust-free wet air energized by weak radium acting from ^ = 35 cm. 

 Bar. 75.8 cm.; temp. 27 C. Wet glass walls. 



1 w o. 



