Nature of Dielectric Capacity. 17 



Table V. (continued). 









0. 



S. 



Se. 



Te. 





% 





1 

 3023 



2 

 12-35 



3 

 1755 



4 





(N'-l)V.. 





2798 





B 





616 



157 



17-1 



20-2 





N 





1-492 



1-787 



2-027 



. 2-385 





K 





2-226 

 2-597 

 •5564 



3-195 

 2038 

 •4925 



4109 

 4-619 

 •5151 



5-689 





o 





6-237 





r 





•4844 







N. 



P. 



As. 



C. 



Si. 



u 





. 1 

 . 3-332 



2 

 13-43 



3 



17-38 



1 

 5 



2 



<N' 



-i)v 



7-5 



B 





. 8-00 



13-5 



132 



36 



11-2 



N 





. 1416 



1-995 



2-317 



2-391 



1-67 



K 





. 2004 



3-981 



5-367 



5-718 



2-789 



P 





. 1-750 

 •5007 



2-297 

 •4944 



5-682 

 •4974 



3-333 

 •5562 



2-50 





•459^ 



In this table the data for the halogens are probably the 

 best, and in this family the mean value of the ratio is 049395, 

 from which the average departure is only 0*2 per cent, and 

 the maximum departure 0*3 per cent. In this family there 

 is the special relation that both B and u have values as 1, 2, 

 3, 4. In the He family I have put for He u=^ ? to indicate 

 that there is no sure guidance as to what the value of u 

 should be. A fractional value of u presents some difficulty 

 of interpretation. If for He z« = l/3 the ratio would be 0*460 

 in close agreement with the results for A, Kr, and X. As 

 the table stands, the results for He and Ne are a good deal 

 too small. In the table as a whole it will be noticed that 

 those elements which have definitely ascertained values of B 

 from the density in the solid state show a good approach to 

 constancy in the ratio. For the value of the ratio is large. 

 For C and Si the available data allow only a rough determi- 

 nation of the ratio. On the whole the table shows that the 

 theory gives a good account of dielectric capacity in the 

 non-metals. The interesting questions of the transition from 

 metal to non-metal, and of the action of an element electri- 

 cally positive in some compounds and negative in others 

 have not been discussed, as they would lead into further 

 complications hardly ready for discussion. 



The data for hydrogen should be considered here, namely, 

 (N' - 1)V= 1-559 and B = 3'18 from the kinetic theory, which 

 make N = 1490, K = 2 22, p = 0'3145, and with u = i the 

 ratio (N'-lJVp^/KB 2 / 3 ^ 3 is 0-3504, and with u=l/3 it is 



Phil. Mag. S. 6. Vol. 19. No. 109. Jan. 1910. C 



