i 5 6 



VAPOR NUCLEI AND IONS. 



The table gives the angular diameter (5) of the successive coronas, 

 and other data to be presently explained, from which the number of 

 nuclei (n) per cubic centimeter may be obtained. Observations were 



Table 54. Colloidal nucleation (s) of dust-free air near the fog limit in their time 

 variations, observed two or more times daily, dp = 27 em. (observed at fog chamber, 

 isothermally) = p~p 3 - Computed dp =p- p. 2 = 21 em. 



