LIST OF FIGURES. 



CHAPTER I. 



PAGE 



Figure i. Apparatus for comparing nucleation and ionization 4 



Figure 2. Modification of preceding apparatus, with side influx tube and removable desiccator. ... 5 



CHAPTER II. 



Figure i . Apparatus for comparing nucleation and ionization 17 



Figure 2 . Simplified detail of coronal chamber (Fig. i , A) 20 



Figure 3. Forms of impinging jets 20 



Figures 4 to 6. Curves showing electrometer deflection (leakage), after consecutive half -minutes, for 



different charges and potentials in the condenser 24 



Figures 7 and 8. Curves showing radial currents (amperes) for Siflferent charges and potentials (volts) 



in the condenser 27 



Figure 9. Tube condenser with sliding and removable outer coating 34 



CHAPTER III. 



Figure i. Chart giving curves showing relations of apertures computed from successive e.xhaustions 



(i, 2), and the relation of diameter of fog particles computed from successive exhaustions (4, 5) 41 



Figure 2. Chart giving curves showing ratios of nucleation computed from successive exhaustions and 

 from measured apertures (S, g, 10, 11, 12), and corresponding diameters of fog particles in 

 centimeters (6, 7) 42 



CHAPTER V. 



Figure i. Diffusion chamber 52 



Figure 2. Chart showing the vapor pressures at different heights in the lapse of time when water vapor 



diffuses into air 52 



Figure 3. Same as 2, but for diffusion of air originally J saturated 52 



CHAPTER VI. 



Figure i . Cubical condensation chamber 58 



Figure 2. Long condensation chamber 58 



Figure 3. Valve for sudden exhaustion 58 



Figure 4. Chart for Table i, showing the relation of nucleation and of diameter of fog particle in 



terms of the apertures of the coronas 61 



Figure 5. Chart for Table 3, showing the relation of relative nucleation to the number or order of 



exhaustion 79 



FiGiTRE 6. Chart for Table 8, showing the relation of nucleation and of diameter of fog particle in 



terms of the apertures of the coronas 77 



Figure 7. Chart for Table 10, showing same 7g 



Figure 8. Chart for Table 13, showing same 79 



Figure 9. Chart for Table 13 , showing same 83 



Figure 10. Chart for Table 14, showing same 83 



XV 



