Saponification velocity —> 
HEE 
i) 
Nolen Naat vyectdan N./io Ni/s 
Concentration —> Fig. 3. 
Curve I relates to saccharose. 
Curve IT , „ imvert-sugar. 
Curve III „ „ d-glucose 
Curve IV ..,. ,. d-fructose. 
Curve Moen mannitol. 
These curves must, of course, intersect in one point (W). 
A glance at the figure shows at once that the saponification- 
velocity is considerably retarted by saccharose ; still more so by invert- 
sugar. The result showing that the influence exercised by d-glucose 
and d-fructose is different, is of importance as d-fructose retards the 
saponification to a much larger extent than d-glucose. 
Mannitol, however, exercises but little influence even in the strongest 
solutions and thus behaves like ethyl and methyl alcohol. 
In connection with what has been said at the commencement 
about KULLGRENS researches, we see that saccharose, d-glucose, 
d-fructose and invert-sugar behave like acids. Invert-sugar is stronger 
than cane-sugar, d-fructose stronger than d-glucose. The remarkable 
behaviour of cane-sugar solutions observed by RA{MAN and Surc 
may be easily explained after these results. 
In a following communication the results obtained will be sub- 
jected to calculation. 
Stockholm, University physical Laboratory. Aug. 1899. 
