54 Laws of the Elementary Voltaic Battery. 



4 inch. 2 inch. 1 inch. 



1st. effect, -420° -310° -180° 



V 112 81 60 



17. With the view of obtaining a wider range of comparison, two 

 new slips were prepared, 10 inches long, 1 inch wide, and 1:^ dis- 

 tant. These were immersed, successively, to 10, 8, 6, &,c. inches in 

 the solution of 1 to 94. After the first minute of action, the deflec- 

 tion was permanent, or nearly so. These observations, at intervals of 

 a minute, were taken while the slips were exposed to the solution. 

 The slips, being then removed, were allowed to repose without wiping 

 for 5 minutes. The adjustment for immersion being made, at the 

 end of the 5th minute, the slips were again immersed. The follow- 

 ing are the results. 



In new plates we have always observed a very violent action on 

 the first immersion, we therefore commenced by a preparatory im- 

 mersion, to their full depth 10 inches, to bring them to their stable 

 condition. 



1st. effect, -720° 



i' ------ 500 



V - - - - . . 400 



U' - - - - - - 240 



2'' ----- - 135 



3' 132 



4' - 132 



5' 132 



After an interval of five minutes from the last observation above 

 recorded, the series was begun, always noting as near as practicable, 

 the instantaneous effects. — 



