Te GALACTOSES ESSE 
Fig. Le 
We may, therefore, expect here a same phenomenon as with the 
glucoses; the numerical values it is true will not be equal to those 
of the glucoses but still not differ much therefrom. 
We have prepared the «galactose from milksugar by hydrolysis 
with dilute acids and repeatedly recrystallised the same from alcohol; 
although the rotation was normal, the electric conductivity remained 
somewhat too high, namely 32 > 10 ® KHb for 0,5 mol. solution. 
The mutarotation was now determined successively in conductivity 
water and in a solution of 0,5 molar H,BO,; then the change in 
the eonductivity for 0.5 mol. «-galactose + 0,5 mol. H,BO, was 
determined. The latter had to be done as quickly as possible so as 
not to let the range of the slider on the scale turn out too small. 
From these measurements it follows: 
1st That the mutarotation constant is not or but little affected 
by borie acid. 
Zed That the mutarotation constant is equal to the constant of the 
conductivity change, both considered as reversible unimolecular 
reactions seeking an equilibrium. 
3rd That in the e-galactose the hydroxyl groups are situated more 
favourably than in the g-galaetose for the conductivity influence 
decreases so that it claims the cis-form (symbol I). 
4th That the influence of the galactoses on the conductivity of 
boric acid is but trifling, still more so than that of the glucoses. 
From the observed exaltations of the conductivity of the «- and 
8-glucose, as well as of the «-galactose and of the equilibrium mixture, 
it follows that the 9-glucose as well as the f-galactose cause an 
