A CONTINUOUS RECORD OF ATMOSPHERIC NUCLEATION. 33 



TABLE 14.— LOSS OF WATER NUCLEI IN LAPSE OF TIME. ESTIMATED. 



■ Note that the second jet gradually loses efficiency. 



16. Effect of condensation on ionization. — The following table shows the 

 effect of precipitation oti the ionization of the water nuclei. The original current 

 (without condensation) is given both for positive and for negative charges. 

 The condensation was produced by exhaustion immediately after the jet was 

 shut off and but a few minutes allowed for subsidence of the fog. Only a small 

 number of nuclei relatively to the total number therefore can have been re- 

 moved. On the other hand, however, the original ionization has vanished as 

 the result of condensation, for the residual currents are below those correspond- 

 ing to the normal leakage of the condenser and electrometer, and are thtis mere 

 errors. One may note that both the positive and the negative ionization is com- 

 pletely removed by condensation, even though subsidence of fog particles has 

 been all but excluded. 



TABLE 15.— IONIZATION OF WATER NUCLEI AFTER PARTIAL PRECIPITATION. 



