A CONTINUOUS RECORD OF ATMOSPHERIC NUCLEATION. 



79 



Direct measurements of the O; by comparison with lycopodium gave 5, = .78 

 and .84 for the near and far faces of the chamber whence a, = .0026 (diffraction) 

 and w = 5i55\ This is in the usual way smaller, and nls' larger than the 

 subsidence datum (0; = . 002 2 3), but the latter will be taken here as above. 

 Both values are compared in the tables, the ratio being .t>\ = n' In". 



22. Apertures of the discs of the coronas. — Table 10 contains two inde- 

 pendent series of results aiTanged as in the preceding tables. The source of 

 light is the Welsbach mantel. The data are further shown in figure 7. 



-« ?c?o---?S^ . 



Figure 5. — Chart showing the Relation of Relative Nucleation (r) to the Number (z) or 

 Order of the Exhaustion for Table 3. 



Figure 7. — Chart showing the Relation of the Actual Nucleation (m) to the Number (z), or 

 Order of the Exhaustion, for Table 10. Also the Diameter d (in io"' cm.) of the Fog Particles 

 IN Terms of z. 



Figure 8. — Do. for TABLEJ13. 



