then 



of Electrification by Evaporation, 

 vcT 



403 



But <f =65 centimetres, as stated above; and v =s0"00374 ^ 



in electrostatic units, according to Sir William Thomson's 

 measurements*, Then 



A - 4u "T^- , 



in terms of the original measurements in the experiments. 



Table I, 

 Showing Results of earlier Series, 



Liquid. 



Deflection 

 with evapo- 

 ration, 



Deflection 



with dry 



dish. 



d, 



in scale- 

 divisions. 



in scale- 

 divisions. 



t, 



in minutes. 



Distilled water A 



Solution NaCl 1 



4-12 



4-82 



3-95 



2-48 



6-70f 



347 



3-10 



4-60 

 4-33 

 4-50 

 233 

 4-68 

 4-40 

 394 



+0-48 

 -0-49 

 +0-55 

 -0-15 

 -2-62 

 +093 

 +0-84 



42-02 

 42-05 

 41-55 

 42-00 

 41-75 

 41-50 

 42-20 



5 

 5 

 5 

 5 

 5 

 5 

 5 



Liquid. 



in minutes. 



W, 



in grammes. 



A, jSign of appa- 

 in centi- rent charge 

 metres. of vapour. 



Distilled water 1 



Solution Na 01 \ 



43 

 43 

 37 



41 

 55 

 54 

 89 



1-44 

 0-49 

 0-54 

 0-80 

 029 

 0-48 

 0-70 



630 



210 



237 



1170 



24 



85 



194 



++ 1 1 + 1 + 



* Papers on Electricity and Magnetism, p. 245. 



t Throughout this series there was an instantaneous deflection at 

 breaking contact, which was several times larger than the total deflection 

 obtained during the five minutes' insulation. The series is therefore of 

 much less value than any of the others, in which the instantaneous deflec- 

 tion was never more than 0-1 of a division. 



