lO 



A CONTINUOUS RECORD OF ATMOSPHERIC NUCLEATION. 



Nuclei were again aspirated into the receiver over phosphorvis. The leakage was 

 apparently different for charges of opposed sign; but this w-as due to the in- 

 sulation of the condenser, which is greater for negative than for positive charges. 

 Deducting this, the values of the ionization, a, differ by quantities which lie 

 within the errors of observ^ation. 



As the receiver in the course of the efflux of nucleated air shows fogs of 

 continually increasing density, the spontaneous precipitation must have been 

 equally effective for positive and for negative nuclei. 



TABLE 



-IONIZATION OF PHOSPHORUS NUCLEI. CHARGE IN CONDENSER 

 AT lo VOLTS. dV/dt= 2.5 LITERS/MIN. 



TABLE 6.— RESULTS. 



In tables 7, 8, similar restdts are given, but with the insulation tested after 

 each passage of nucleated air through the condenser. The results taken con- 

 secutively are shown in table 8. 



