and Spark-length for Small Values of the latter. 

 Table VI.— Platinum. (Fig. 9.) 



627 



1st Series. 



2nd Series. 



Distance, Potential, 

 X. volts. 



Distance, 

 X. 



Potential, 

 volts. 



1 



I'D 



1-5 



2 



2-2 



25 



2-5 



2-7 



3 



3 



4 



110 

 180 

 185 

 225 

 250 

 310 

 280 

 260 

 280 

 350 

 350 



1 



•9 

 15 

 2 



2 



25 



3 



3 



4 



8 

 10 

 125 

 15 

 25 

 37-5 



90 

 150 

 350 

 230 

 260 

 350 

 350 

 350 

 350 

 350 

 350 

 360 

 400 

 435 



Table VII.— Antimony. (Fig. 10.) 



Table VIII.— Magnesium. (Fig. 11.) 



1st Series. 



2nd Series. 



Distance, 



Potential, 



Distance, 



Potential, 



X. 



volt?. 



X. 



volts. 



2 



115 



1 



110 



2 



245 



1-5 



185 



25 



270 



1-5 



125 



25 



250 



1-7 



285 



3 



240 



2 



350 



3 



220 



2 



160 



3 



320 



2-5 



350 



3-5 



350 



2-5 



175 



35 



350 



25 



180 



4 





3 



350 







3 



180 







4 



350 



1st Series. 



2nd Series. 



Distance, 

 X. 



Potential, 

 volts. 



Distance, 

 X. 



Potential, 

 volts. 



15 



2 



2-5 



27 



3 



3-5 



4 



5 



35 

 215 

 270 

 300 

 155 

 260 

 275 

 350 



2 



2-5 



2-5 



3 



35 



4 



4 



170 

 195 

 110 

 205 

 275 

 325 

 335 



