A CONTINUOUS RECORD OF ATMOSPHERIC NUCLEATION. 



31 



jets, whereas the nucleation is deficient. The reason will presently appear 

 (§ 14). The ctuTents for negative charges in the condenser, moreover, are 

 exceptionally small relatively to the positive currents. 



No charge was imparted to the condenser by the spray, the current vanish- 

 ing with the potential ; but this also occurs at times with the radial jet. 



TABLE 12.— SPRAY FOUND IN SMALL SPACE AND REMOVED BY AUXILIARY 

 AIR CURRENT. JET NO. 3, CAPILLARY THREADS, SELF-SHATTERING. 



TABLE 13.— SPRAY FORMED IN GRADUALLY DIMINISHING SPACE AND RE- 

 MOVED BY RISING SURFACE OF WATER. 



14. Summary of the relative degree of ionization and nucleation. — The 

 number of nuclei, and the electric conduction of the nucleated air, are quantities 

 which increase and decrease together. Nuclei and ionization are produced 

 whether the jet is shattered by a solid obstacle, by two impinging jets, or by 

 jets impinging on a surface of water, but the efficiency of the spraying arrange- 

 ment depends on the degi-ee of comminution produced, and in this respect the 

 jets shattered at the highest velocity by a solid obstacle are preferable. When 

 the jet is shattered on itself or on a surface of water, the electrical current 

 vanishes with the potential difference in the condenser, so far as can be seen; 

 or at least is less than 5 per cent, of the constant positive current. When the 



