A CONTINUOUS RECORD OF ATMOSPHERIC NUCLEATION. 

 TABLE 3.— Continued. 



TABLE 4.— RESUME. 



Insulation (room air) 



Filtered damp air 



Nucleated damp air (i) (fresh P) . . 



Nucleated damp air partially dried. 



(2) 



(3) 



Phosphoinis nuclei direct (i) 



(2) 



' From condensation chamber. 

 2 From ionizer. 



The charge in the condenser is negative as before. It should be more 

 rapidly dissipated if negative ions are precipitated more rapidly in the receiver, 

 than a positive charge. To obtain dense nucleation, room air was again 

 aspirated over phosphorus into the receiver, from which it was then discharged 

 as expeditiously as possible, the time taken being from 5-10 minutes. 



10. Effect of different charges in the condenser. — In the next experiments 

 the sign of the charge was varied. To find comparable results it was thus neces- 

 sary to maintain a definite current through the condenser, and about 2.5 liters 

 per minute was adopted compatibly with the dimensions of the apparatus. 



