234 . C. W. R. POWELL. 
yielding glucose and fructose. As these two sugars have 
much simpler molecules than sucrose a quicker reaction 
with potassium permanganate might be expected, and this 
was experimentally found to be the case. 
The following experiment was performed under similar 
conditions to the previous experiments, the concentrations 
employed being as follows :— 
Concentration of glucose ac + . (@)- “LSS Ane 
5 potassium permanganate (6) ‘0113 ,, 
i. sulphuric acid ee biscs 
Temperature 15° C. 
t n x (a-x) (b-2) k, k, 
Bs ‘bel ae 380) Ulli eeaee es 
3 102 :0024 $-1365 :0089 -0795-° -0000469 
4 14:0 :0053- +1336. -0060 “160 ‘000116 
5 1li4 *0080 -:1309.5 -0033 5, :244 "000183 
6. 205 -O104 1285” -0009 +326 ‘000320 
a 21% 3011S 1276 
For a solution of sucrose of acid concentration 1°16 N. 
the amount of inversion which would proceed in 20 minutes 
(roughly the time taken for complete decomposition for the 
concentrations given) at 15°C. would be about one-twertieth 
of the total sucrose, so that for strongly acid solutions the 
velocity of reaction would be slightly increased as the 
reaction proceeded, owing to the faster rate of decompo- 
sition of the sugars formed. 
However, in most of the later experiments, where the 
rate was considerably increased by the addition of various 
reagents, the time taken for total decomposition seldom 
exceeded twenty minutes, so that for the greater number 
of the experiments the influence of the greater activity of 
the reducing sugars upon the velocity of reaction may be 
neglected. 
Another of the main products of the reaction is man- 
ganese sulphate, and it was thought possible that this 
