A CONTINUOUS RECORD OF ATMOSPHERIC NUCLEATION. 



41 



cessive exhaustion are abbut 1.5 times larger than the same data estimated 

 directly from the apertures of the coronas. 



Moreover, the new values of diameter d' show a curious periodicity which 

 nuist be peculiar to them, since the old values from the manner in which thev 



zoom 



Chart i. — Curves i and 2, Relations of Apertures Computed from Successive Exhaustions 

 (5), AND Directly Measured (x')- Long Cylindrical Receiver, 13 cm. in Diameter. Curve 3, the 

 Same for Plate-Glass Apparatus 20 cm. Deep. Coronas here Difficult to Place. 



Curves 4 and 5, Relation of Diameter of Fog Particle Computed from Successive Exhaustions 

 (d), and from Measurements of Aperture {d'), both Given in Centimeters. Long Cylindrical 

 Receiver. The Types of Coronas are Marked gr (Green Centered), cr (White-Crimson Centered). 

 Curve 5 Dropped .0002 cm. Small Dots Refer to a Special Series. 



