BANCROFT. — TERNARY MIXTURES. 361 



TABLE XXXVIII. 



X = c c. H.,0 ; y = c.c Ethylbutyrate ; 5 c c. Alcohol, Temp. 20°. 

 Formula {x - 0.005 y)"^ {y - 0.008 x) / z«i + ' = Ci ; n^ - 244 ; log C, - 1.449. 



1.449 

 Formula (x - 0.005 y)"^ (^ - 008 x) / s"* + ^= C^ ■,n.2 = 1.20, log Cg = 1.623. 



TABLE XXXIX. 



X = c.c. Water ; y = c.c Isoamylacetate; 5 c.c. Alcohol Temp 20° 



Formula (x - 0.012 y)»> (y - 002 x) / s'" + 1 = Cj , ji^- 3.50 ; log C^ =1.414, 



X. y. 



Calc. Found. Calc. Found. log C,. 



7.00 7.00 0.41 0.41 1.414 



6.00 6.00 0.70 0.70 1.414 



5.01 5.00 1.32 1.31 1.411 



1.559 



Although Pfeiffer does not say so, his araylacetate and ethylvalerate 

 are unquestionably iso- and not the normal compounds. We can now 

 take up the results given in Tables XXXVII.-XXXIX. and see how 

 satisfactorily they fulfil their object. Ethylbutyrate and amylacetate 

 show the change from one equilibrium to the other at the same point 

 that Pfeiffer found. The ethylbutyrate and ethylisovalerate mixtures 

 are perfectly regular at concentrations beyond those used by Pfeiffer, 

 and the isoamylacetate is normal throughout both in Pfeiffer's work 



