(445) 



sugar and lime occurs. For this investigation, only the irisaccharate 

 is of importance. This compound when precipitated from aqueous 

 solutions has according to many investigators, the formula Cj^ U^.^ 0^^, 

 3 Ca 0, 3 Ho 0. On warming sugar solutions treated with lime ^), at 

 tlie ordinary temperature, the trisaccharate is precipitated. 



The trisaccharate, however, is not stable, at a higher temperature, 

 in the presence of water and sugar solutions (those of a \ery high 

 concentration perhaps excepted). If we take into consideration that, 

 in the cases to be investigated, tlie trisaccharate separates in the 

 solid state, but that the defmite equilibrium between the compound 

 and the com|)onents is attained but slowly, and that the phenoineiui 

 occurring before the equilibrium has set in must be investigated 

 also, the necessity arises to look uj)on tlie system as being pseudo- 

 quaternary. ^) 



Fig. 1. 



In the equilateral triangle SWC (fig. J) the apexes represent the 

 pure components, saccharose water and calcium oxide, respectively, 

 and the points T and K indicate the composition of the trisaccharate 

 and the calcium hydroxide respectively. The temperature is taken as 

 80°. If no^v no trisaccharate occurred either in the solid condition 



1) Many investigators speak wrongly of solutions "saturated" with lime at the 

 ordinary temperature. 



2) Compare H. R. Kruyt, (Chem. Weekblad 7, 133 (1910)). The nomenclature 

 there given is used here. 



30* 



