42 



A CONTINUOUS RECORD OF ATMOSPHERIC NUCLEATION. 



were obtained (geometric progression) cannot be periodic. There is accelerated 

 increase of diameter toward the crimson types, Nos. 9 and 14, and a falling off 

 which may even be a retrogression toward the green types, Nos. 4-5, 11-12, 

 15-16, these being respectively the crests and troughs of the wave. The 



CHART 2. CURVES 8, 9, to, RATIOS OF NUCLEATION COMPUTED FROM SUCCESSIVE EXHAUSTIONS (n 

 PARTICLES PER CUB. CM.), AND FROM MEASURED APERTURES (') LONG CYLINDRICAL RECEIVER. 



CURVES II AND 12, THE SAME FOR ANOTHER CYLINDRICAL RECEIVER, 2O CM. DEEP. CURVE II REFERS 

 TO WATER NUCLEI, CURVE 12 TO PHOSPHORUS NUCLEI. 



CURVES 6 AND 7, CORRESPONDING DIAMETERS OF FOG PARTICLES IN CENTIMETERS. 



