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PROCEEDINGS OP THE AMERICAN ACADEMY 



It will be seen that all of these results are identical within the limit 

 of error of the process. We may, therefore, draw the conclusion, that 

 the amount of heat evolved by the reaction thus represented, 



(ii2,„ Cl„ + AgN03 + Aq) = AgCl + aE,jm,X + Aq), 



is constant, no matter what Ji, m, or n may be. 



Hence, also, the difference between the heats of formation of equiva- 

 lent amounts of nitrate and chlorides in aqueous solution is the same 

 for any metal or basic radical. 



IV. — IS THERE A CONSTANT RELATION BETWEEN 

 THE HEATS OF FORMATION OF CHLORIDES AND 

 SULPHATES IN AQUEOUS SOLUTION? 



By Irving W. Fay, A. B. 1886. 



The series of results obtained by Mr. Richards, as above described, 

 suggested the inquiry whether a like constant relation might not be 

 found between the heats of formation of the chloj'ides and sulphates in 



* In this experiment 8 grms. of AgNOs were used. 



