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 falHng off 

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

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



Chart 2. — Curves 8, 9, 10, Ratios of Nucleation Computed from Successive Exhaustions (« 

 Particles per cub. cm.), and from Measured Apertures (n')- Long Cylindrical Receiver. 



Curves ii and 12, the Same for another Cylindrical Receiver, 20 cm. Deep. Curve ii Refers 

 to Water Nuclei, Curve 12 to Phosphorus Nuclei. 



Curves 6 and 7, Corresponding Diameters of Fog Particles in Centimeters. 



