40 



Dr. G. Gore on a Method of Measuring 

 Table XIII. (continued). 



Ingredients. 



E.M.F. 



Compounds 

 formed. 



E.M.F. 



Calculated 

 E.M.F. 



Change of Per 

 E.M.F. cent. 



HI. 



1-3129 



Ebl. 



KI. 



Nal. 



1-1699 



1-16418 



1-1413 



1-0963 

 1-1125 

 1-1454 



Gain -0736 = 671 



„ -05168 4-64 



Loss -0041 359 



H 2 S0 4 . 



1-38726 



Rb 2 S0 4 . 

 K,S0 4 . 



Na 2 S0 4 . 



1-30146 

 1-29002 

 1-2700 



1-0142 

 1-0092 

 1-0514 



Gain -2872 =28-30 

 „ -2808 27-83 

 „ -2186 20-79 



HNO,. 



1-4720 



KbNOv 

 KNO3. 



NaN0 3 . 



1-19278 

 1-17848 

 1-1721 



1-1699 

 1-19278 



10740 

 1-0814 

 10370 



Gain -1187 = 11*05 

 „ -09708 897 

 „ -1351 309 



HCIO3. 



1-3558 



KCIO3. 

 NaCl0 3 . 



1-079 

 1-1188 



Gain -0909 = 842 

 „ -0739 6-61 



Formic acid. 



1-0698 



EbFormiate. 1-04406 

 K „ 1-04978 

 Na „ 1-04692 



•9223 

 •8724 

 •8936 



Gain -1217 = 1320 

 „ -17738 20-33 

 „ -1533 17-14 



Table XIV. — Positive metal, Magnesium. Strong Solutions. 



Ingredients. 



E.M.F. 



Compounds -^ -^ p 

 formed. 



Calculated 

 E.M.F. 



Change of Per 

 E.M.F. cent. 



K 2 C0 3 . 

 Formic acid 



Acetic ,, 



1-25836 

 . 1-6416 

 1-9592 



K Formiat* 

 K Acetate. 



;. 1-5558 

 1-7131 



1-4116 



1-5843 



Gain -1442 = 1021 

 „ -1288 8-13 



Conclusions from the Results in Section B. 



1st. In all the cases with acids and carbonates, whatever 

 kind of positive metal was employed, there was either a loss 

 or gain of electromotive force due to the chemical change. 

 2nd. The losses were more frequent than the gains. 3rd. 

 Whilst in Section A, where the energy of chemical union 

 was much greater, the number of cases of loss was 81, and of 

 gain only 1, in the present Section the numbers were 57 and 

 13 respectively. 4th. The amount of loss or gain depended 

 upon the same conditions as in Section A. 5th. The 

 losses were greater with formic acid and with csesia than 

 with all other substances, the same as in Section A ; and 

 were usually larger with very dilute solutions than with more 

 concentrated ones, but the order of loss with salts of 

 potassium was nearly the same with strong solutions as with 



