ELECTROMOTIVE FORCES. 



757 



f Amalgamated Zinc "\ 



Leclanche . \ Solution of Sal-Ammoniac > I '46 



(. Binoxide of Manganese and Carbon . . ) 



r Amalgamated Zinc ~\ 



Poggendorff . . . j Solution of Chromate of Potass . . . > I '08 

 ( Carbon ) 



r Zinc -% 



Warren de la Rue . j Solution of Sal-Ammoniac . . . . > I '02 

 C. Chloride of Silver and Silver . . . . ) 



C Amalgamated Zinc 



Daniell. J I Sulphuric Acid + 4 Water .... 



' J Saturated solution of Sulphate of Copper 



( Copper ] 



f Amalgamated Zinc ~\ 



Daniell \ I Sulphuric Acid + 12 Water . . . . > O'97 



C Saturated solution of Sulphate of Copper ) 



Amalgamated Zinc 



J. Regnault , . I Sulphuric Acid +12 Water .... 



I Sulphate of Cadmium 



Cadmium 



Amalgamated Zinc 



Marie-Davy . J I Sulphuric Acid + 12 Water . . . 

 Paste of Sulphate of Mercury . . . 

 Carbon 



Amalgamated Zinc 



Bunsen. . I Sulphuric Acid + 12 Water . ... 



Fuming Nitric Acid 



Carbon 



Amalgamated Zinc 



Bunsen 4 ' Sulphuric Acid + 12 Water .... I>g 



Nitric Acid (d. = I '38) 



Carbon 



Amalgamated Zinc 



Grove 4 " Sulphuric Acid + 4 Water . . . . ^ 



Fuming Nitric Acid ....... 



Platinum 



Amalgamated Zinc 



p ff i J I2 Bichromate of Potass + 25 Sulphuric 



' ' Acid + 100 Water 



Carbon . 



1293. THERMOELECTRIC COUPLES. The thermoelectric power 

 of two metals is a linear function of the temperature (280). Since, 



