7 2 



CONDENSATION OF VAPOR AS INDUCED BY NUCLEI AND IONS. 



TABLE 30. Temperature comparisons. Radium on top of fog chamber. D = o. 



SUMMARY OF RESULTS. 



46. New investigations. In tables 31,32, and 33 data were investigated 

 for X-rays of different strengths and for dust-free air. In the latter 

 case the coincidence of data is not as close as was anticipated, different 

 apparatus showing a somewhat different behavior. The results are all 

 given in fig. 23. The drop in the upper X-ray curve is probably due to a 

 breakdown in the X-ray bulb, as it is not sustained by the other curves. 



Fig. 23 also contains Wilson's series, under the supposition that the 

 coronas begin with the green of the third and end with the green of the 

 second series. In such a case the present results lie in a region of lower 

 supersaturation than Wilson's. The slopes throughout are similar. If 

 Wilson's colors are of the second and first series, the green alone will 

 appear in the diagram, the other nucleations being too high. In such a 

 case Wilson's line will intersect the graphs of the present paper, as shown 

 by the graphs of the point g 2 1- 



