644 PROCEEDINGS OF THE AMERICAN ACADEMY. 



Averages. 

 C„H2„+iCH3 - C„H2„+iC00H = 160 Cal. 



Summary. 

 C„H2„+iCH3 - C„H2„+i • CONH2 = 83 Cal. 



a P V 



In the presence of CONH2 80 81 86 



Differences from 83 Cal., the ^^ normal" Value. 



a p y 



In the presence of CONH2 -3 -2 +3 



IV. 



CH3-CONHC6H5I4 



A 



COOH present. 

 a CH3 • COOH -CeHe-NH- CO COOH 207 - 863 = - 656 



P CH3 • CH2 • COOH - CeHs • NH • CO • CH^ • COOH 



364 — 1013 = - 649 

 y CH, • (CHa)^ • COOH - CeHs • NH • CO • (GE,), • COOH 



520- 1166 = - 646 



Summary. 

 C„H2„+iCH3 - CJI^^+iCONHCeHs = - 645 Cal. 



" Id., 52, 59 (1895) ; 55, 203 (1897). " Id. 



