NUCLEATION CONSTANTS OF CORONAS. 



61 



steam jet. It seems curious that the diffraction phenomenon should 

 begin with particles of the order of three times the wave-length of light. 

 Using the method of contact of coronas from two sources described 

 below, the ratio of diameters of the first four series is much more nearly 

 as i, 2, 3, 4, for the green coronas for instance, than in the present 

 experiments. 



34. Insertion of new values for m. The values of m used in the 

 above tables were throughout obtained from the earlier experiments. 

 As the relations of n are not affected and as m does not influence d and 5 

 (see equations, section 26) the latter will be left in this form. The nuclea- 

 tion n varies as m. Since that time, however, new data for m were 

 investigated compatibly with Chapter II. Inserting these in tables 16 

 and 17 and agreeing that n shall hold for dp/p 0.219 and 20, io 8 ra = 

 3.2 must be replaced by io 6 m = 3.6. In table 20, similarly, for 

 dp/p = o.224 and 20 C., io 6 m = 3.6 must be replaced by io 8 7^ = 3.7. 

 These results have been compiled in table 23, which is adapted for 

 practical purposes. The results are nearly coincident. These data will 

 be used in preference for the computation of nucleation. 



TABLE 23. Values of -y and n referred to new values of m. 



