592 Philippine Journal of Science 1920 
Table 4. — Glucose oxidation by 'potassium permanganate at various tem- 
peratures rising from 29 ° to 95 ° C. in two minutes. 
“ Length of time after 95° C. had been reached. 
Table 2 shows the volumes of 0.1 N potassium permanganate 
used to oxidize 10 milligrams of dextrose at different intervals 
of temperature for a total volume of 60 cubic centimeters and 
with heating power so regulated that it raises the temperature 
of the mixture from 29° to 95° C. in exactly four minutes. In 
all determinations ten or eleven quadruplicate observations were 
made. Column four shows the actual number of cubic centime- 
ters of potassium permanganate used for oxidation, and column 
five gives these same values in percentage of the volume of 0.1 
N potassium permanganate solution required for the complete 
oxidation to carbon dioxide and water of 10 milligrams of 
glucose. For each determination blanks were run, and the val- 
ues in column four are actual values minus the corrections for 
the average blanks. 
Tables 3 and 4 are similar to Table 2, but the heating power 
here is that required to raise the temperature of the mixture, 
60 cubic centimeters and 100 cubic centimeters, respectively, 
from 29° to 95° C. in exactly two minutes. 
Tables 2 and 3 were prepared by oxidizing the glucose with 
25 cubic centimeters of 0.1 N potassium permanganate solution 
diluted to a final volume of 60 cubic centimeters, while Table 4 
was obtained by using 50 cubic centimeters of 0.1 N potassium 
permanganate diluted to a final volume of 100 cubic centimeters. 
The procedure followed was that described under C, with cor- 
responding modifications. 
The data in these tables are visualized in fig. 6 in which the 
