. The Philosophical magazine; a journal of theoretical, experimental and applied physics. th those yielded by the halogens andby their acids. 4. Curve of HjSO^ at 60° C. The range of degrees of strength of the solution was thesame as in the previous case, viz. from 001 to 01 grain ofthe substimce in 155 grains of water. Fig. at60°r. Weak Solution. Volt. 1-35 y^^^^^^^^^^^^^^^H^^ ^^^^^^^ ^^^^^^**^^sMI 1-326 WBBM ^^^^H H^^^ri|^^^B 1-300 B^&H I^^^^^^^H 1-2751-2501-225 1-2-117 mmMi •■;• ■■^:^ ^:.^ -t ^^^^^^^^^^^^E i-i:1-1 ^^^ I^^H^B 1100 H Hum — —< ct c^ n Grains. S 5 o 8 S iO tA
. The Philosophical magazine; a journal of theoretical, experimental and applied physics. th those yielded by the halogens andby their acids. 4. Curve of HjSO^ at 60° C. The range of degrees of strength of the solution was thesame as in the previous case, viz. from 001 to 01 grain ofthe substimce in 155 grains of water. Fig. at60°r. Weak Solution. Volt. 1-35 y^^^^^^^^^^^^^^^H^^ ^^^^^^^ ^^^^^^**^^sMI 1-326 WBBM ^^^^H H^^^ri|^^^B 1-300 B^&H I^^^^^^^H 1-2751-2501-225 1-2-117 mmMi •■;• ■■^:^ ^:.^ -t ^^^^^^^^^^^^E i-i:1-1 ^^^ I^^H^B 1100 H Hum — —< ct c^ n Grains. S 5 o 8 S iO tA ^ ^ t-. By comparing the curves obtained at the two differenttemperatures, we find that a rise of temperature caused ageneral increase of electromotive force, greatest at the com-mencement, and quite sufficient to distinguish the one curvefrom the other. The difference would probably be muchgreater with stronger solutions (compare figs. 9 and 10 ofKBr at 18= C. and 60° C). 408 Dr. G. Gore on a New Method and Fig. of HCl, HBr, and Ul.—Stronff Department of Chemical Research. 409 5. Cn-ves of HCl, HBr, and Strong Solutions., These solutions were one liundnHl times stronger than tlie])revious ones in order to fit them tor comparison with thoseof the corresponding salts ; they contained from 10 to IOgrain of substance in 155 grains of water. The degrees ofelectromotive force of the solution of hydrochloric acid werevariable, and those of the other two acids less so. These curves are drawn upon a scale 292 times as largevertically as those of the previous ones, in order to fit themfor comparison with those of the corresponding salts. Theyshow :—1st. A general increase of electromotive force attend-ing gradually increased strength of liquid. 2nd. A muchlarger increase produced by the first amount of substanceadded than by the succeeding ones. 3rd. A gradation ofdegree of general increase of such force varying inversely asthe magnitudes
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