312 TABLE 3B3. 



COMPOSITION AND ELECTROMOTIVE FORCE OF VOLTAIC CELLS. 



The electromotive forces given in this table approximately represent what may be expected from a cell in good work- 

 ing order, but with the exception of the standard cells all of them are subject to considerable variation. 



* The Minotto or Sawdust, the Meidinger, the Callaud, and the Lockwood cells are modifications of the Daniell, 

 and hence have about the same electromotive force. 



SMITHSONIAN TABLES. 



