292 Dr. G. Gore on the Molecular 



aggregates with each other are indicated. The numerical re- 

 sults contained in the following Tables support this statement. 

 Each definite compound formed is the one having the smallest 

 amount of voltaic energy, and its formula is indicated by a 

 star (*). 



- The chemical union indicated by the minimum amount of 

 voltaic energy in Tables III. to IX. is a distinct phenomenon 

 from the chemical and thermal changes which occur during 

 mixing the constituent solutions of each pair of substances. 



Table III.— HN0 3 4- H 2 S0 4 . Voitdo 



energy. 

 3HN0 3 4-2H 2 S0 4 . Between 3,604,651 and 3 ; 900,000 at 11° 0. Average 3,752,325 



4 „ 4-2 „ * „ 3,000,000 „ 3,300,000 „ „ 3,150,000 



5 „ +2 „ „ 3,555,046 „ 3,780,487 12 „ 3,204,295 



Table IV. ~Na 2 S0 4 + HN0 3 . 



2Na 3 S0 4 4-5HN0 3 . Between 81,579 and 91,176 at 18° C. Average 86,377 

 2 „ +4 „ # „ 73,313 „ 81,579 „ „ 77,446 



2 „ +3 „ „ 84,700 „ 92,261 „ „ 88,480 



Table V.— NaN0 8 4- H 2 S0 4 . 



3NaN0 3 4-2H 2 S0 4 . Between 33,695 and 37,440 at 18° O. Average 35,564 



4 „ 4-2 „ * „ 31,000 „ 34,444 „ „ 32,722 



5 ,, 4-2 „ „ 35,469 „ 39,440 „ „ 37,454 



Table VI.— Na 2 S0 4 + H 2 S0 4 . 



4Na 2 S0 4 4-5H 2 S0 4 . Between 31,900 and 35,477 at 12° C. Average 33,689 

 4 „ 4-4 „ * „ 29,245 „ 32,291 „ „ 30,768 



4 „ 4-3 „ „ 32,631 „ 36,046 „ „ 34,338 



Table VII.— NaN0 3 4- HN0 3 . 



4NaN0 3 +5HN0 3 . Between 24,603 and 27,200 at 12° C. Average 25,901 

 4 „ 4-4 „ * „ 22,142 „ 24,603 „ „ 23,372 



4 „ 4-3 „ „ 24,603 „ 27,200 „ „ 25,901 



Table VIII.— NaNO s + Na s S0 4 . 



8NaNO a 4-2Na 2 S0 4 . Between 79 and 88 at 12° 0. Average 83-5 



4 „ 42 „ * „ 70-4 „ 79 „ „ 74-7 



5 „ 4-2 „ „ 79 „ 88 „ „ 83-5 



Table IX.— Na 2 S0 4 , 2HN0 3 4- 2NaN0 3? H 2 S0 4 . 



3(Na 2 S0 4 . 2HN0 3 )+4(2NaN0 3 , H a S0 4 ). Between 2,583 and 2,870 at 13° C. Average 2,726 

 4( „ )44( „ )* „ 2,280 „ 2,541 „ „ 2,410 



5( )4-4( „ ). „ 2,541 „ 2,818 ,, „ 2,679 



