46 



ELECTRICITY. 



(62) ELECTROMOTIVE FORCE OF CONSTANT BATTERIES IN VOLTS. 



Daniell I. 

 Duniellll. 

 Daniell III. 

 Bunsen I. 

 Bunsen II. 

 Grove 



H 2 S0 4 

 HoS0 4 

 HS0 4 

 H 2 S0 4 



4H0 CuS0 4 

 12H a O,CuSu 



) strong 

 ' 



Copper 



+ 12H~OCu2 



H 2 S0 4 



12H 2 

 4H,0 



4 

 N0 



HN0 3 



HN0 3 (A 1-38) 



HNOo 



Copper 

 I solution Copper 



Carbon 

 Carbon 



1-079 

 973 

 1-000 

 1-964 

 1-8 



Platinum 1 '956 



A constant Daniell element consisting of an amalgamated zinc 

 plate in a saturated solution of zinc sulphate, and a copper plate in 

 a semi-saturated solution of copper sulphate gives an E.M.F. of 

 1'07 volt. 



(63) ELECTROMOTIVE FORCE OF COMMON BATTERIES. 



Volts. 



Volta (zinc, acid, copper) (Bailie) 1*048 



Smee (zinc, acid, platinised silver) '47 '65 ? 



Maiche (zinc in mercury, acid, salt solution, platinised 

 carbon) ... 1*25 



Daniell (zinc, acid, copper sulphate, copper) (Sir Wm. 

 Thomson) 1'12 



Daniell (zinc, acid, copper sulphate, copper) (Latimer 

 Clark) I'll 



Daniell (zinc, acid, copper sulphate, copper) (Bailie, 

 Kohlrausch) 1'138 



Grove (zinc, acid, hydrogen nitrate, platinum) (L. 

 Clark) 1-97 



Grove (zinc, acid, hydrogen nitrate, platinum) (Kohl- 

 rausch) 1'942 



Bunsen (zinc, acid, hydrogen nitrate, carbon) 1*75 1*964 



Latimer Clark (mercury, mercurous sulphate, zinc) .. 1'435 



Leclanche (zinc, ammonium chloride, carbon, man- 

 ganese dioxide) ( Bailie) 1 "41 7 



De la Rue (zinc not amal., ammonium chloride, silver 



and silver chloride) 1'03 1'059 



Marie-Davy (zinc, acid, carbon and mercuric sulphate) 1'52 

 ,, ,, (zinc, acid, mercurous sulphate, carbon)... 1*2 



Bichromate cells freshly set up, about 2 ? 



Niaudet (zinc, salt-water, bleaching-powdcr, carbon)... 1'65 1*5 



Varieties of Grove's Cell (Poggendorff). 



Hydrogen sulphate A 1*136, hydrogen nitrate fuming. 1-955 



A 1-136, , A 1-33.. 1-809 



A 1-060, , A 1-33.. 1-73 



,, A 1-060, , A 1-19.. 1-631 



Zinc sulphate solution, , A 1*33.. 1'673 



Sodium chloride solution, . A 1'33.. 1'905 



