142 



A CONTINUOUS RECORD OF ATMOSPHERIC NUCLEATION. 



which would be even more apparent if night observations had been made. The 

 cause is obviously convection, and the diagram necessarily presents marked 

 similarity to a wind curve. 



The feature of the data from November i-io (charts 3 and 4) is the ten- 



/U-feK il 



n « ii ?5 



Charts 3 AMD 4. 



dency to notched minima at mid-day or in the early afternoon. The maximum 

 on the nth coincides with a slight drop in temperature, but beyond this the 

 temperature is so nearly constant until November 24 that reasons for the vari- 

 ations of the figure are not forthcoming. The remarkable rise on the 21st may 



«5M. 



aijtsu a 



be noticed. On November 14 and 23 there are mid-day minima, but others are 

 not apparent. During the remainder of November (chart 5), rain minima 

 occur on November 25, 26, and at the end of November 29. The maximum on 



