30 



In these two cases there was an apparent inversion of 20 per cent, of 

 the sucrose. Another trial with better chips gave the following re- 

 sults : 



Taking all the data into consideration, it appears to be fair to assume 

 that the inversion during the extraction in the flask was not more than 

 5 per cent, of the sucrose present, while during the first of the season 

 it was doubtless much less. A strong corroboration of the justice of 

 this allowance is found in the fact that the purity of the chipsanalyzed 

 up to October 1, with the correction noted, is nearly exactly the same 

 as that of the mill juices. 



In the diffusion battery, where the temperature was kept at about 

 70 0., the inversion was not so great. 



In any case, however, these analyses can only be accepted provis- 

 ionally. The reliable analyses are those of the mill and diffusion juices. 

 Since the results for the chips, however, agree so closely with those 

 known to be correct, they can be accepted for all practical purposes. 



Since the extraction in a flask does not afford a direct method of de- 

 termining the total soluble solids in the chips, this must be done by cal- 

 culation. 



For this purpose the same ratio between glucose and other sub- 

 stances not sugar in solution is taken as that existing in the corre- 

 sponding mill juices. 



Applying this principle, we find that up to October 1 the following 

 data are accessible. 



Per cent. 



Glucose in mill juices 4. 01 



Solids not sugar in mill juices 3. 06 



Ratio, 1 glucose to .76. 



Glucose in chips 3.32 



Not sugars calculated 2.52 



Sucrose.., .8.85 



Total solids in chips 



14.69 



