334 



TENTH ANNUAL REPORT OF 



DANIELLS' BATTERY. 



SMEE'S ELEMENT. 



WOLL ASTON' S ELEMENT. 



In the last vertical column are the computed values of the electro- 

 motive force, which shall he spoken of later. We must append a few 

 remarks on the separate experiments whose data are given in the 

 tahles. 



The nurahcrs under the head ''Insertion" indicate the reduced 

 length of the inserted wire. 



The sulphuric acid used in the first experiment with the Deleuil 

 arrangement was diluted with ahout ten times its quantity of water ; 

 in the second and third, the acid was diluted still more. The nitric 

 acid had a specific gravity of 1.18. 



