Oct. 1,1919 Notes on the Composition of the Sorghum Plant 15 



the tests described above for galactose, arabinose, and xylose, with the 

 following results: 



Test for xylose + 



Mucic acid for galactose — 



Osazones for galactose — 



Osazones for arabinose — 



Fig. 12. — Development of the crude fiber ia the various parts of the sorghum plant. 



This indicates that the carbohydrate contained in the insoluble portion 

 of the alcoholic precipitate is xylan, or at least that xylose-bearing cellu- 

 lar material is included in it. 



The conclusion can be drawn from the above results that the material 

 precipitated by equal volumes of alcohol from sorghum juice consists of 

 protein, cellular material that was in suspension in the juice, and gums. 



