4 ART. 1. Y. OSAKA : 



acid so as to make tlie solution similar to those in the other 

 cases, diluted to 25 c.c. and polarised : 



(9) 20.094°, (10) 20.104°; mean: 20.099.° 

 Thus we find the degree of the inversion in the original 

 solution in percentage as follows : 



20.099+6.313 



20.099 + 6.594 '^^^^~^^-^' 



With solution of other concentrations, the experiments and 

 calculation were carried out quite similarly, so that merely the 

 results will be reported. 



II. 'éO ff rams of caite sugar in *Î00 ce. 

 of the solution, 



25 c.c. of the solution weighed : 



{a) 31.872, {b) 31.872; mean: 31.872. 



ïSolution taken out llotation of the liL'tatioii calculated for 

 in grams. solution diluted the mean dilute 



to 25 c.c. solution. 



Inverted in tlie original solution. 



{à) [ 



(1) 6.1883 -5.659° -5.663° 



(2) 6.2090 -5.662° -5.647° 



(3) 6.1627 -5.628° -5.656° 



(4) 6.1826 -5.638° -5.647' 



Mean : -5.769° 



