70 CONDENSATION OF VAPOR AS INDUCED BY NUCLEI AND IONS. 



TABLE 23 Continued. 



The same, with larger auxiliary condensers: Capacity of fog chamber, 11.4 cm.; 

 C", 1049 cm. ; C', 330 cm.; wires and electrometer, 69 cm. ; total, 1459 cm. Current 

 due to gamma-rays without d (log V)/dt = o. 00021 (pos. ch.) to 0.00022 (neg. ch.). 

 Time interval 4 sec. Radium I-V. Charges positive and negative. Positive 

 charge K = 28gXio 6 ; cm. of scale equivalent to 0.0608 volt. Negative charge 

 /t' = 3i9Xio 6 ; cm. of scale equivalent to 0.0613 volt. 



59. The same. Coronas. Table 23 contains the data for the maxima 

 obtainable with the radium tubelets I, II, III, IV, V, at my disposal. 

 The corresponding corona was a large orange-yellow type, corresponding 

 in my former reductions to 506,000 nuclei in the exhausted fog chamber. 

 I have supposed this to be equivalent to 653,000 when the fog chamber 

 is at atmospheric pressure, seeing that the coronas are actually displaced 

 during exhaustion; i. e., at the maximum ionization does not coincide in 

 the position with the largest corona on exhaustion,* but is displaced in 

 the direction of the exhaust currents. This would seem to mean that 

 exhaustion is more rapid than the reproduction of ions to restock the 

 region of dilatation. In general this inherent discrepancy of a marked 



*See Chapter III; also Science, xxvui, p. 26, 1908. 



