194 



Bulletin 143. 



could be examined separately. These halves were analyzed with the 

 following results : 



In these five cases the sugar and purity were not equally distributed. 

 The upper halves being richer in sugar whilst the purity was consider- 

 ably higher in the lower halves except in No. 5. 



In obtaining juice for analysis it is necessary to express as much as 

 possible from the pulp, because that which Jirsf runs from the press is 

 not so rich in sugar as that which is obtained toward the ejid of the 

 operation. Thus in five cases tried the per cent, of sugar and percent, 

 of purity were as follows : 



Method of Analysis. 



When al the juice was pressed out that could be obtained it was 

 thoroughly mixed and its density ascertained by means of an areometer 

 (Brix) specially constructed for this purpose and from that the total 

 solids of the juice found ; corrections were made for variations in 

 temperature when necessary. 



Next, 52,096 grams of the juice were weighed and transferred to a 

 100 c. c. flask; 10 c. c. of a solution of sub-acetate of lead, made as 



