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Prof. E. Taylor Jones on the most 



The efficiency is easily calculated in the present case. The 

 maximum secondary potential, for z = 10 amperes, is 596900 

 volts. If the resistances were negligible, and if the system 



Fig. 5. 



Primary potential. 



were exactly in the first unit-efficiency adjustment, the 

 maximum secondary potential would be, by (3a), 798700 



] =*559. 



The energy originally in the system is JLjio 2 , i. e. since 

 L 2 is about *255 henry, 12' 75 joules. The maximum electro- 

 static energy in the secondary circuit is therefore *559 x 12'75, 

 or about 7*1 joules. The energy then stored in the primary 

 condenser (capacity *2 mfd.) is i . *2 . 2250 2 . 10 ergs, or 

 about *5 joule. 



Consequently of the original 12' 75 joules rather over 5 are 

 dissipated, half a joule is stored in the primary condenser, 

 and the remaining 7 joules are available to provide for the 

 secondary discharge at the moment of maximum potential. 



The charge then on the secondary is (' 2 V 2 and may be 

 calculated when the capacity G 2 is known. If we knew the 

 value of the ratio L 2] /L 12 the capacity could be at once 



