60 



Laws of the Elementary Voltaic Battery. 



25. In order to expose the plates a less lime to the solution for 

 reasons before assigned, the following were made, in which the de- 

 flections were noted at the end of each minute. 



Thirty minutes were consumed in heating the solution to boiling, 

 which took place at 210°.- The ebullition was gentle, to avoid agi- 

 tation of the liquid, which would have brought into play a portion of 

 the surface above the parts immersed. It will be observed in com- 

 paring these results with the former in which a more rapid change of 

 temperature was effected, namely, in 18 minutes, that the increased 

 effect arising from temperature is somewhat less than before. 



As we are now prosecuting these investigations upon the powers 

 of the battery in its various modifications of form, Stc, we shall re- 

 serve for a future paper the more practical applications of the facts 

 we have been developing. It is apparent from what we have already 

 shown, that the efficiency of the present galvanic arrangement is ca- 

 pable of being greatly increased, and the experiments we are now 

 making with the compound battery may enable us to show, we hope, 

 to what extent. 



If the experiments detailed, throughout the foregoing paper be cor- 

 rect, and we have not been able, on a careful revision, to discover any 

 thing in the mode of making them which ought to invalidate their re- 

 sults, we have arrived at some conclusions which have an important 

 bearing on the theoretical question of the source of the electricity in 

 the battery. Why, if the chemical theory of the battery be true, 



