0.18**5 -ram of dry matter dissolved in 40 e. e. of \% caustic potash, 

 solution. 



Detection of Xylose. 

 The syrnp gave the following reactions: 



1) . It reduced Fehling's solution very strongly. 



2) . It rotated the plane of polarization toward the right. 



phloroglucin and hydrochloric acid. 



4) . It produced no mucic acid upon oxidation with nitric acid. 



5) . It gave no ketose reaction with resorcin and hydrochloric acid. 



6) . 2 drops of the syrup were placed on an object glass and were seed- 



ed respectively with a crystal of xylose and of arabinose. After 48 

 hours the drop seeded with xylose showed the formation of many 

 new crystals, while the other remained unchanged. 

 From the al>ove reactions it is highly probable that the syrup contained: 



The syrup was left untouched about one week, when it was found 

 thickly laden with fine crystals. A little amount of 85% alcohol was added 

 to the syrup, well mixed, filtered with suction and washed with absolute 

 alcohol and ether. The sugar thus obtained was 2.5 grams in weight and 

 slightly yellowish in color, but upon reeryscallization from alcohol with the use 



1.13 grams of the carefully dried sugar was dissolved in water and made 

 up into 25 c. c. and polarized in 200 mm. tube, in the half shadow polariscope. 

 Strong birotation was observed. 



After 24 hours, the rotation was found to be 4.7.5° on the scale toward the 

 right. The specific rotatory power is 



