. The Philosophical magazine; a journal of theoretical, experimental and applied physics. action. 2nd. A very small increaseof electromotive force in each case on adding the first portionof substance, and on subsequent additions ; and the amountsof these increases, contrary to what ha[)pened with othergroups of substances, varied directly as the magnitudes ol themolecular weights of the salts, but the degree of reversedaction was not conspicuous. 3rd. A sufficient difference ofform to characterize each substance. And 4th. The chemicalunion of oxygen with the three corresponding halogen salts,r
. The Philosophical magazine; a journal of theoretical, experimental and applied physics. action. 2nd. A very small increaseof electromotive force in each case on adding the first portionof substance, and on subsequent additions ; and the amountsof these increases, contrary to what ha[)pened with othergroups of substances, varied directly as the magnitudes ol themolecular weights of the salts, but the degree of reversedaction was not conspicuous. 3rd. A sufficient difference ofform to characterize each substance. And 4th. The chemicalunion of oxygen with the three corresponding halogen salts,reduced the general electromotive force in each case, and theamount of reduction varied inversely as the magnitudes of themolecular weights of the salts (compare fig. 9). 11. Curves of K2SO4 and Na2S04. The potassium salt was very pure ; the sodium one con-tained traces of chloride. The solutions were of the samerange of degrees of strength as those of the halogen salts ofthe same metals, viz. from 1 to IO grain of salt in 155 grainsof water. Volts. Fig. of , at 14-5° Volts. Department of Chemical Research. Fig. of Xa SO^ at 17° C. 4 IT) 1-26 HHHIV ^^^^^HH 1-24 ^^^^^^^K H^^^B l-2n ^^H ^^-^ mJR B^H 1-21 J^^Bt ^PPPf^^H l-2vl-ivin ^K^.^-ifeSSwrt,: 1-17 K ig^^H Vlfi 1 ^^^^B i-i: K ^^^^B 1 u ^toiii^^n H^^^^^B 1-13 ^^^^^^1 ^^^^^^^1 V12 ^^^^^^^^^H ^^^^H^^I^Hi These two curves are largely alike, due to their being thoseof closely allied salts of the same acid ; but somewhat differentin consequence of difference of their metallic bases. They areboth considerably different from those of the chlorides, bro-mides, and iodides of the same metals. 12. Curves o/KCl + KI, and KCl + measurements of electromotive force of these weremade to ascertain the influence of more complex compoundsupon the amount of that force. The salts were mixed in theproportions of their molecular weights, and the proportions ofmixtures taken were the same as those of the same salt
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