Copper wire compared with solutions in tubes 

 1-2 plainly less. 



33 1 



8 scarce sensib. less. 



4 sensib. gr. 



5 scarce sensib. 



5 sensib. gr. 



6 seemed rather gr. 



7 not sensib. diff. 



i seemed rather less. 



El. = 3- 



El. = 4. 



638] Two Leyden vials were made of barometer tubes filled with and 

 coated on outside with tinfoil. The quantity of electricity in them was found 

 to be very nearly the same, but that in N i rather the greatest. 



The charge of each of these tubes is about 714 inches, and that of the large 

 jars about 6100, and that of the three jars i, 2 and 4 together is also 6100*. 



The shock of these tubes was received through my body in the same manner 

 as in trying the large jars, either by making the shock pass through the copper 

 wire or through the sat. sol. or receiving it in the simple manner without passing 

 through either: the experiment being tried as usual by charging both tubes 

 from the same conductor and receiving the charges of one one way and the 

 other the other. 



639] It was found by repeated trials that the shock received through the 

 copper wire was plainly greater than the simple shock. When received through 

 the sat. sol. with wires f 



in contact not sensib. less than simple. 



at -i dist. seemed rather less, but doubtful. 



5 

 i 

 2 

 4 

 6-6 



D. scarce doubtful. 



not doubtful. 

 D. 



considered less. 



The tubes charged to ij by old electrometer. 



640] It was also found by the small jars i, 2 or 4 that the shock received 

 through the wire was stronger than the simple shock. 



The shock through the wire was also much greater than the simple shock 

 when the covering which was put over the wire to defend it from accidents 

 was taken away. 



It was also plainly greater when the shock passed through only 3 rows of 

 the wire instead of the 8. 



* [Probably globular inches. The numbers do not agree with those in Art. 583.] 

 f {See end of Note 31.} 



