TABLE 280. 



DIFFERENCE OF POTENTIAL BETWEEN METALS IN SOLUTIONS OF 



SALTS. 



The following numbers are given by G. Magnanini * for the difference of potential in hundredths of a volt between 

 zinc in a normal solution of sulphuric acid and the metals named at the head of the different columns when placed 

 in the solution named in the first column. The solutions were contained in a U-tube, and the sign of the differ- 

 ence of potential is such that the current will flow from the more positive to the less positive through the ex- 

 ternal circuit. 



* " Rend, della R. Ace. di Roma,'' 1890. 



t Amalgamated. 



t Not constant. 



5 After some time. 



II A quantity of bromine was used corresponding to NaOH = i. 



SMITHSONIAN TABLES. 



269 



