126 



A CONTINUOUS RECORD OF ATMOSPHERIC NUCLEATION. 



agree with each other. In fact, the subsidence data fall very nearly on the 

 curve corresponding to the fourth part of table 13. 



TABLE 13. DIAMETER AND NUMBER OF FOG PARTICLES FROM SUBSIDENCE 

 MEASUREMENTS, d X io = iSy'u; n = g/d' X io 6 ; dp = 17 cm. 



The nucleation for the gbp corona (n = 100,000) agrees closely with the 

 mean results above (n = 96,000), table 17. 



Beyond the gbp corona (n = 100,000), however, the new data for n are with 

 few exceptions much larger than the coronal values, at least with the interval 

 5 = 6 to io cm. From the difficulty encountered in observing this very slow 

 subsidence and the variable coronas, the discrepancies are much more liable to 

 rest with the subsidence data than with the other (coronal) group. 



IV. SUMMARY OF RESULTS FOR NUCLEATION. 



26. Preparation of a table for deducing the nucleation from the observed 

 coronal aperture. In conclusion, it will be useful to collect all the data obtained 

 for the nucleation on a single sheet. Accordingly a chart was drawn up (too 

 large for convenient reproduction here) containing the results of Chapter VI, 

 table i, series i and 2, table 8, series i and 2, and table 13, series 1,2, and 4, 

 as well as the best subsidence data of the last section. The latter are to be dis- 

 tinguished by a special symbol. The curves are found to lie closely together 

 until the lower gbp corona (5 = 4-3~4-5) is reached, where the first periodicity 

 occurs. They then pass with wider divergence through the middle gbp corona 



