234 Proceedings of the Royal Society of Victoria. 



Table X. 



Influence of varying the sugar present. 



N N 



50CCS.— KMnO^ and lcc.-H.,SO^ were employed in each case. 



Duration of Eicperiment, 30 minutes. Temperatiire, 94°C. 



No of i '^'^^' ^^ 

 Fvripri. "^ o„„„. Total volume 

 ment 500 ^^S^"^ of Liquid. 

 I used, 



KMnOt 



reduced to 

 Mn02 



(«) 



Mn02 

 precipitated. 



Oxygen atoms 

 Loss of I abstracted 

 "active per molecule 

 oxygen." , of Suftar 

 (average). 



56ccs. 

 66ccs. 

 V6ccs. 



16-7 

 47-25 



170 

 47-25 



111-25 



25-27 

 23-62 

 22-25 



* This experiment has been i^iven before in Table VIII. 



It was evident that the volume must be kept constant, so 

 another series of experiments was conducted at 85-0°C., in which, 

 after adding the KMn04, acid and sugar and sufficient distilled 

 water was I'un in to make the total volume up to 76ccs. 



As diluting the solution will naturally make the action slower, 

 the duration of each experiment was lixed at 80 minutes. 



Table XI. 



Inflriience of varying the amount of sugar prese?it. 



N N 



50cc3. — KMnO^ and Ice— H2SO4 were employed in every case. 



Duration of Experiment, SO minutes. Temperature, 85°C. 



