226 C. Bancs — Velocity and Structure of the Nucleus. 



Table I (continued). 



Solvent. 



Water 

 Water 



Water 



Water 



Water 



Water 



Water 



Water 



Water 



Water 

 Water 



Water 

 Benzol 



Solute. 



Ca2]S'0, 

 Alum 



(dry) 

 Na,SO, 



H.N NO3 



Na.PO, 



Sucrose 



Glucose 



Glycerin 



Urea 

 Alcohol 



Tartaric 

 acid 



Concen- 

 tration, c. 



•00014 

 1-5 

 •015 

 •9 



•009 

 •00009 



2 

 •02 



2 



•02 



•9 



•02 

 1-6 



•016 

 2-6 



•026 



2 





 1-6 



2 



•02 



•0002 



Nuclea- 

 tion, n. 



60 

 200 



90 

 450 

 110 



50 

 190 

 129 

 280 

 140 

 195 



160 



51 

 150 



50 



95 



50 

 HO 



55 



43 

 130 

 100 



95 



Absorption 



velocity, h. 



cm/min. 



Benzol Paraffine 



4 



05 



11 



07 



12 



1 



03 



11 



06 



07 



06 



13 



19 



14 







1 



3 



19 



8 



8 



02 



02 



20 



Nuclear 

 velocity, /c. 

 cm/min. 

 7^1 



•25 



•56 



•36 



•61 

 W 



•15 



•56 



•31 



•36 



•31 



•66 



•97 



•71 

 5-1 

 5-6 

 12^ 



•97 

 24- 

 9- 



•10 



•10 



ro 



Naphtha- 2 90* ^04 ^20 



lene ^02 90 -03 ^15 



none 80 ^02 •lO 



1 130 ^02 •lO 



80 -04 ^20 



. Benzine none .. 72 •le ^82 



2. Remarks on the data. — The main deductions from these 

 tables have been briefly given elsewheref and need not there- 

 fore be detailed here. Great caution is necessary because of 

 the inevitable irregularities of the results. The dependence of 

 the nucleation, n^ on the concentration c, agrees fairly well 

 with the equation, oi = ^o+^/(log(^/c)), where A and B are 

 constants. Hence in making comparisons, it will be con- 

 venient to refer all data to the logarithmic concentration, log 

 c, from the peculiar character of the results. In a general 

 way the number of nuclei evolved, caet. ])ar.^ depends on the 

 mass of solute dissolved per cub. cm., and for 1 per cent solu- 

 tions is within rather narrow limits independent of the saline 



* These data are computed as if the solvent were water. Thej^ are thus 

 partly relative. The data needed to find n for benzol are not consistently 

 forthcoming. 



t Science, xv, pp. 912-914, 1902. 



