Short Spark-Disch 



taraes. 



707 



from 0*1 ohm to ao at complete rupture within the distance 

 of 30 f.t/j. The point of rupture can be determined within 

 1 /</' under favourable conditions. 



If a discharge is passed between the surfaces which have 

 been separated, to a distance of say 100 ^u, they will cohere. 

 If now the surfaces are slowly separated the resistance, which 

 had become very low, will gradually increase. They can with 

 care be separated to a great distance before rupture will again 

 occur. The accompanying curve is quite characteristic. 

































, 





























600 



f 















500 



r 















400 

 500 



fa 















I 











































































40 60 80 



ft£SI3T/WCF IN OHMS. 



Table. 

 Data taken December 14,1904. — After the cohering following 

 a discharge, the surfaces were separated and the resistance of 

 the coherence determined. 



*v 



Galvanometer 



reading. 



d. 



Resistance. 



Open 



335 





X 



Short circuit 



235 









41 



23-5 



117 



0-15 



13-5 



236 



386 



1-5 



15-5 



238 



443 



5-0 



17-0 



239 



)»; 



60 



180 



240 



515 



8-0 



21 h i 



24 3 



• r >7i' 



l:;o 



221 1 



249 



630 



230 



235 



254 



l»72 



340 



260 



266 



; i.-. 



680 



27 



27-8 



"•2 



L150 



27-5 



33o 



787 



DC 



Break 



