TABLE OF CONTENTS. 



CHAPTER r. 



On the Effect of Temperature and of Moisture on the Emanation of Pliosi)liorus, and on a 

 Distinction in tlie Behavior of Nuclei and of Ions 



Introduction. 



1. Object. 



Volumetric Comparisons. 



2. Apparatus. 3. Metliod and data. 4, 5, 6. Discussion. 7. Data for low temperatures. 



Electrical Comparisons. 



8. Apparatus. 9. Method. IK. Data. 11. Discussion. 12. Contrast witli color data. 18. 

 Electrical experiments repeated. 14. Discussion. l.">. Peiinanent conduction produced by 

 the emanation. 16. Specially dried phospliorus grids. Data. 17. Discussion. 18. Cor- 

 roborative experiments with the color tube. 19. Corroborative experiments with danij) 

 paper. 20. Corroborative experiments with desiccators. 21. Effect of prolonged drying. 

 22. Promiscuous experiments. Temperature of condenser. 23. ("omparison of old and 

 new grids. 24. Older data compared with the present data. 25. Conclusion and Summary. 



CHAPTER 11. 



General Observations Relating to Coronas and Axial Colon 



Introductory. 



1. Purposes of the present chapter. 2. Classification of the experiments. 



Apparatus. 



3. Tubes. 4. Disc. 5. Globes. 



Results for Coronas. 



6 General character of the phenomena. 7. Observations with small globes. 8. Observa- 

 tions with a larger globe. 9. Axial colors. 10. Polarized light. 11. Geometric sequences 

 of coronas. 12. Loss of nuclei in the lapse of time. 13. Working hypothesis. 14. Application. 

 lb. Globe experiments repeated. 



Values of the Nucleation Corrected. 



16. Amount of precipitation. 17. Numerical values. 18. Relative size of cloud particles. 



Results for A.xial Colors. 



19 Apparatus: Conical drums. 20. Observations with the single drum. 31. Polarized 

 light. 22. Preliminary observations with the double drum. 33. Definite observations for 

 axial color. 34. Loss of nuclei in the lapse of time. 3.5. Correction for precipitated moisture. 



Discussion. 



26. Data for coronal and axial colors compared. 27. Time losses interpreted. 28. Estimated 

 size of cloud particles. 39. Estimated size of nuclei. 



23 



