4 ART. 11. — T. YAMAMOTO : THE FUSION CURVES 



species CeHcO, (CgH60)2, (CgHcO)3, etc., respectively, K^y ^3 etc., 

 are the so-called dissociation constants. 

 The reversible reactions 



(C«HeO)2 + CeHeO ;! (CeH,0)3 

 3(CoHoO), ^ 2(0^0)3 

 etc., etc., 



mnst take place simultaniously with the reactions («), (Z»), etc., 

 and the relations 



YÏ — 2 3 



^3 



etc., etc., 



must also hold. But as these relations can all be deduced from 

 the foregoing («), (/9), etc., we need not take them into con- 

 sideration. 



Careful examination of the experimental data, however, showed 

 that the molar fraction of the chemical species (C6H60)2 can 

 but be small in comparison Avith those of CeHgO and (C6H60)3. 

 The presence of the higher polymers in any great concentration 

 appears also to be improbable. Hence the chief chemical reaction 

 which we have to consider in the study of the system is 



3 C^HeO -^ (CeHeO)3 



with the corresponding reaction isotherm 



i = «- 



It is interesting to note that the only instance, for which 

 the quantitative relation of the reversible polymerisation in the 



