Xii TABLE OF CONTENTS. 



Benzine. 



38. Concentration. Time losses. 



Deductions. Systematic Comparison of the Data. 



39. Dependence of the number of particles on tlie concentration of the solution. 40. Mass 

 action. 41. Dei>endence of the ubsurption velocity on the concentration of the solution. 



Summary and Inferences. 



42. Values of the nucleation, »i. 43. Values of the absorption velocity, t. 44. The tliernio- 

 ilynaniif hypothesis. 4.'>. Etpiations for lUlute solutions. 46. Et|uatious for concentrated 

 solutions. 47. The ruechaMism generalized. 48. The critical density. 49. Temperature and 

 pressure. Conclusion. 



CHAPTER VI. 



The Diffu.sion of Nurlei of Like Origin in Different Media 138 



Introduction. 



1. Types of diffusion phenomena. 2. Conditions of homogeneous distribution. 3. Eflfect 

 of the medium. 4. Structure of nuclei. 5. Possible electronic agencies. 6. Thermodynamic 



agencies. 



E.xperimental Ecjuipment. 

 7. Method. S. Apparatus. 



Results. 



9. Benzol. 10. Hygroiiiflric discrepancy. 11. Toluol. 12. Acetone. 13. ,\myl alcohol. 

 14. Ethyl alcohol. 15. Methyl alcohol. H>. Water. 



Inferences and Summary. 



17. Rates of diffusion. 18. Relations to other physical constants. 19. Comparison of the 

 present and earlier values of absorption velocity. 20. Conclusions. 21. Ionization and 

 nucleation in relation to cloudy condensation. 



APPENDIX. 



Quadrant Electrometry with a Free Liglit Needle, Highly Charged through a Conductor 



of Ionized Air 1^3 



Introductory. 



I. Method. 2. Original constants. 3. A|>paratus. 

 Scj>aration of the Charge of the Insulated Needle by Induction. 



4. Method of charging. 5. Observations. 0. Idiostatic data. 7. Sliscellaneous tests. 8. 

 Quartz liber. 9. Single-fibered silk. 10. New electrometer. 



Preliminary Results with a Highly Charged Needle. 



II. Charge by induction. 13. Charge by conduction. 13. Miscellaneous experiments. 14. 

 Summary. 



Transmission of Charge hy Ionized Air. 



l.">. Phosphorus emanation. 16. Highly charged needle. 17. Summary. 



