A CONTINUOUS RECORD OF ATMOSPHERIC NUCLEATION. 83 



easy means of wetting the whole inside by revolution of the apparatus around 

 the trunnions was a great convenience. But in spite of this, color distortion of 

 the coronas was an almost invariable occurrence, particularly when the interval 

 between Observations was short. Since in comparison with the case of the taller 



FIGURES 9, 10. CHARTS FOR TABLES 13, 14, SHOWING THE NUCLEATION (n) AND THE DIAMETERS (d) 

 op FOG PARTICLES FOR DIFFERENT APERTURES (5) OP THE CORONAS. 



FIGURE 14. CHART SHOWING THE EFFECT OF DIFFERENT VALVES WITH NUCLEATIONS INCREASING IN 

 THE LAPSE OF TIME, FOR TABLE 19. 



vessel above, which showed no appreciable distortion, vapor diffusion is here 

 much enhanced, the discrepancy must be referred to the diffusion of nuclei. 

 This would have to take place unassisted by the convection of vapor. 



26. Reduction of data. For the pressure difference dp =17 cm. and at 20.7, 



