Observations at the' Poles of the Electric Arc. 



965 



included in the graph), to test the above relationship. 

 The results are shown in Table I. for three values o£ current, 



Curves IV. 



VI 



"R 



CSiCUAU 



i f \N'OD£- 'Pft.E.SSVRjEL. 



lt-o 



c 



jo .S^ze- of Houe_<. 



ISO 



atisifarf" .Arc Lesffym op •11^^- 



..,:, 





C^crl D»w-\. 



0>o 



- A . ■ 





85 - 



2a •■ 



rs.o 



HOLE, - "SO " 



li-o 



Q e. CarbgiI 



KOUE. 



. -50 ■> 



in iOO 







/ X 



the test of the hypothesis lying in the values of the product 

 of the diameter of hole and the pressure observed, given in 

 each vertical column : — 







Table I. 











Diameter 



X manometer 



reading. 



Diameter 



of 



Current 



C 



urrent 



Currenl 



hole in mm. 



7*5 amps, 



10 



5 amps. 



14'5 amps 



1-7 





23 





52 



85 



2-3 





28 





53 



82 



3-0 





25 





48 



72 



40 





32 





55 



89 



5-0 





35 





59 



96 



