ii6 Organic Phosphorus Compounds of Wheat-Bran [March, 



There is, in addition, a considerable amount of another sub- 

 stance, very similar in composition, the barium salt of which con- 

 tains only 34 percent of barium, instead of the 38 percent in barium 

 phytate. The f act that this substance does not dialyze indicates that 

 its molecule is larger than that of barium phytate. 



There is, finally, a Compound differing widely from phytin in 

 having more carbon and less phosphorus in the molecule, which by 

 hydrolysis splits off a reducing sugar (pentose), and whose barium 

 salt contains only about 31 percent of barium. We do not believe 

 the composition of this substance has been definitely fixed. It has 

 not been obtained in crystalline form, the analogous crystalline bru- 

 cine salt prepared by Anderson probably being simply brucine 

 phosphate. 



The formulas, C6Hi8024P6Ba3, for the tri-barium salt, and 

 C6H24O24P6, for the acid, accord more closely with our analytical 

 results than any other formulas, although the agreement is not en- 

 tirely satisfactory. 



Two tables of analytic results are appended. 



TABLE I 



P 



c 



H 



From wheat bran, 

 found: Percent 



27.67 



10.90 



3-54 



For inosite 



hexa-phosphate, 



C.Hi8024Pe, calcu- 



lated: Percent 



28.18 



10.90 



2.72 



For CeHaiÜMPt, 

 calculated: Percent 



27.92 



10.81 



3-63 



Found by Patten 

 and Hart: Percent 



25.98 



10.63 



3.38 



For CeHsiOwPs, 

 calculated: Percent 



26.07 



10.08 



3-39 



TABLE 2 



ADDENDUM 



After the proof of the foregoing paper had been corrected and 

 returned to the editor, Anderson* published a new series of papers, 

 ♦ Anderson : Jour. Biol. Chetn., 1915, xx, pp. 463, 475. 483. 493- 



