Electric current in divided circuits 303 



It is supposed that it required about 2f the charge to give a proper shock 

 in water as [it does] out, or it is supposed to require 5 times quant, el. It is 

 supposed too that it requires 2 ce charge of 3 times quant, el. to give same 

 shock with torp. out of water as without torp. 



I body | i 



torp. be as J2 , if quant, el. which 

 water la 



passes through torp. is increased to zn, quant, el. which passes through your 



body || 



in wat. ... , 



, will be 4 , therefore 



out wat. 



a + 2 + i 



must = - , or 



in + i 3x5 



i5 + 30 + 15 = 2na + 6n + a + 3, 

 n (za + 6 30) = 14* + 12, 



140 + 12 



n = - - . which if a = 60. is 



2 - 24 



I4 7 * 5 = 



20. x | 4 



and therefore it should require about 9 times quant, el., or about 5j times the 

 charge, to give the same shock out of water as at present. 



599] Tu. Mar. First leather Torpedo*. 



Out of water. 



i row jars el. to ij by straw el. and commun. to rest, a shock just sensible 

 in elbows. 



1 + 2 + 3 + 4 + 5 + 6+7: just sensible in hands. 

 D + r row: stronger than NO i. 



In water. 



2 rows : plain in hands, 



1 row: just sensible, 



3 rows : rather stronger than 2 D out of water. 



600] Tu. Apr. 4 [1775]. 2 nd leather Torpedo. 

 Out of water, 

 5 + 6 + 7 : very slight in fingers. 



2 rows : only in hands, there seemed to be something wrong. 



4 rows: brisk in elbows. 



2 rows: briskish in elbows. 



* [Art. 416.] 



