406 



Dr. Gr. Gore on a New Method and 



The curves show : — 1st. That the union of hydrogen with 

 the halogens greatly diminished the electromotive force. 2nd. 

 A feeble increase of electromotive force, greatest at the com- 

 mencement, especially with hydrochloric and hydrobromic 

 acids, attending increased strength of the solution. 3rd. A 

 less degree of family likeness than in the curves of the halo- 

 gens. 4th. The substance of largest molecular weight gave 

 the smallest increase of electromotive force. And 5th. Each 

 substance gave a characteristic curve. The general feeble- 

 ness of character of the curves was due to the weakness of 

 the solutions (compare fig. 7, of curves of solutions 100 times 

 stronger). 



3. Curves of HN0 3 and H 2 S0 4 . 



The acids were pure and the range of degrees of strength 

 of their solutions was the same as those of the weak ones of 

 hydrochloric, hydrobromic, and hydriodic acids. 



Fig. 4. 



Volts. Curve of HN0 3 at 14° C. — Weak Solution. 



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Fig. 5. 

 Curve of H,SO, at 15° Q.— Weak Solution. 



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