Copper wire compared with solutions in tubes 333 



than that passed through the wire stretched by the silk threads, and much 

 greater than the plain shock. 



The shock passed through the sat. sol., wires in contact, seemed about 

 equal to the plain shock. 



The spark passed through garden wire seemed rather redder than that 

 through the silk wire, but the difference was not remarkable. 



The spark passed through garden wire seemed about as strong as that through 

 about -8 of an inch of saturated solution, but sensibly redder. 



644] The reel was altered, and some copper wire silvered stretched upon it. 



The mean circumference of reel = 44-05 x 2 Vz. 



There were 12 rows of glass bars and 42 rounds of wire on each row, therefore 

 whole length of wire = 88-1 x A/2 x 12 x 42 = 62,790 inches. This weighed 

 5747 grains. Consequently there are 10-93 inches to i grain. 



The shock received through this wire felt vastly stronger than the simple 

 shock; the shock of tube 2 received through the wire with electrometer at ij 

 seeming little less strong than the simple shock with the same tube and the 

 electrometer at if, but considerably stronger than with electrometer at ij. 



645] The above-mentioned wire compared with sat. sol. by sound. 



1-46. Seemed more brisk. The light of salt water white, the other very red. 



1-7 D\ 



2-5 DO 



3-5 EL = - 



5-5 



8-7 I believe nearly the same. 



8-3 seemed much weaker. El. = 3. 



6 seemed rather greater. 



7-5 doubtful. 



8-5 seemed rather weaker. 



6 seemed rather stronger. 



7-2 doubtful. El. = 3. 



8-5 seemed rather weaker. 



6 doubtful. 

 5 D". 



4 seemed stronger. 

 8-5 seemed rather weaker. 

 8-5 doubtful. 



9-5 I believe rather less, certainly a sharper sound, but I believe rather 

 less loud. 



7 seemed greater. 



