JOURNAL OF THE COLLEGE OF SOIESCE, IMPERIAL UNIVERSITY, 

 TOKYO, JAPAN, 



VOL. XXV., ARTICLE 1. 



On the Inversion of Cane Sugar. 



By 

 Yukichi Osaka, RigakuhahusM. 



Hill (Journ. Chem. Soc. 73, 634 ; 1898.) has shown that 

 the hydrolysis of maltose by the catalytic action of an enzyme 

 is incomplete and that the less the degree of hydrolysis, the 

 more concentrated is the solution. As to the inversion of cane 

 sugar by the catalytic action of an acid, it has been studied ex- 

 tensively from several points of view and it is well known that 

 the hydrolysis is complete. It is not, however, improbable, that 

 the hydrolysis of cane sugar may also be in some measure incom- 

 plete when the solution is highly concentrated. In this respect 

 I have undertaken the investigation of the inversion of cane 

 sugar and obtained the results expected, as shown in the following 

 communication. 



Pure commercial cane sugar was purified by precipitation 

 from the cold saturated aqueous solution with absolute alcohol 

 and washing it with etlier. The experiments and the calculation 

 of the results were carried out as follows : 



I. 80 (jyams of cane sugar in 100 c.c. 

 of the sohlt ion. 



20 grams of cane sugar were introduced into a weighed 

 measuring flask of 25 c.c. capacity and dissolved in a small 



