Air-Blast upon the Spark Discliar ge of a Condenser. 685 

 Table III. — 2 mm. spark-gap with air-blast. 



Cymometer 



Current as 



per cent, of 



max. current 



100 a/A. 



Value of 



Mean Value of 



l- n 



N 



from Curve. 



Calculated 

 Value of 



95 



9-58 



•0069 



•0662 



90 



6-47 



•0010 



•0647 



85 



509 



•0127 



•0647 



80 



4-18 



•0144 



•0609 



75 



3-58 



•01695 



0605 



70 



3-08 



•0192 



0595 





Mean Value = "0627 



Maximum Cymometer Current = A = *101 ampere. 

 Maximum Cymometer Current 



when resistance is added = A. x = 0046 ampere. 

 Calculated Value of S x = -0443. 

 * 2 = -0184. 

 ,, ,, of spark-gap resisistance = 0"80 ohm. 



Table IV. — 3 mm. spark-gap with air-blast. 



Cymometer 



Current as 



per cent, of 



max. current 



100 a/A. 



Value of 



Mean Value 



of 



1-w/N 



from Curve. 



Calculated 

 Value of 



D = c l + d 2 . 



95 

 90 

 85 

 80 

 75 

 70 



9-58 



647 

 509 

 4-18 

 358 

 3-08 



0063 

 •0095 

 •0117 

 •0138 

 0161 

 •0187 



•0604 

 •0615 

 •0595 

 •0579 

 •0577 

 •0577 







Mean Value = '0591 



Maximum Cymometer Current : 



Maximum Cymometer Current 



with added resistance : 



A — 01 195 ampere. 

 A, = 0*0652 ampere. 



Calculated Value of 8, = '0397. 

 J a = -0194. 

 ,, of spark-gap resistance 



0-68 ohm. 



