512 EXPERIMENT STATION RECORD, 



should be continued, the difference in time required by different 

 materials, and other details prevented obtaining- reliable results. In 

 all cases the treatment with 1.25 per cent sulphuric acid dissolved con- 

 siderable amounts of the nitrooen-free c(^ll-Avall constituents. 



The relation of the reducing povrer of normal urines to the 

 amount of certain nitrogen compounds present, J. J I. Lonc; {Jaur. 

 Ainer. Chem. Soc.^ 22 {1900}^ Jto. 6', jjjk J09-o27}. — The nature of the 

 reducing bodies, behavior of uric acid with copper solutions, the deter- 

 mination of creatinin, uric acid, urea and ammonia, and the ratio of urea 

 to uric acid are discussed on the basis of the investigations I'cported. 

 While it is not considered possil)le to draw any exact generalizations 

 regarding the relation between the character of the food and the 

 results obtained, "the urines showing the highest reduction ratio for 

 uric acid and creatinin, as compared with the total reduction, were 

 from men with the strongest physique with a diet containing much 

 meat. On the other hand, the lowest uric acid and creatinin reductions 

 correspond to cases of slighter physique and lower nutrition. . . . 

 But from most of the urines no characteristic relation is apparent." 



The nucleic acid of the embryo of -wheat and its protein com- 

 pounds, T. 1). OSBOKNK and (i. F. CaMTBELL {('ohlKcfii-id Sfdfr Std. 



Bpt. 1899, pt. 3, pp. 305-SS9; Jowr. Amer. Cliein. Soc, 22 {1900), 

 No. 1i,p>p). J75-^Xj).— The authors used for their investigations a 

 quantity of wheat germ meal from which the bran and endosperm had 

 been very thoroughly removed. By methods which they describe in 

 detail they found that the embryo of the wheat kernel contains the fol- 

 lowing substances: 



(1) A nucleic acid, in considerable quantit}", which is not identical 

 with any nucleic acid heretofore described. 



"This acid is insoluble in water, forms soluble as well as insoluble compounds with 

 proteid substances, and on hydrolysis yields guanin, adenin, phosphoric acid, and 

 other products not yet identified." 



(2) Leucosin and an albumin (constituting about 10 per cent of the 

 embryo), formerly found l)y the writers in small ([uaiitities in the 

 whole kernel of wheat, rA^e, and l»arley, and al)undantly in malt. 



"By saturating extracts of the kernel or of the embryo with sodium chlorid, the 

 leucosin is largely precipitated, from the former as a substance readily soluble again 

 in water, from the latter as an insoluble compound containing about 30 per cent of 

 luick'ic acid. From the latter pre<'ipitate, dilute salt solution extracts a small amount 

 of nearly phosphorus-free proteid, which behaves like a gloliulin, l)eing precipitated 

 by dilution or by dialysis, but liaving essentially the same ultimate composition as 

 leucosin. By dialyzing the aqueous extract in water, nearly all the leucosin con- 

 tained in it is precipitated, not like a globulin, but as an insolulilc compound con- 

 taining about 20 per cent of nucleic acid." 



(3) A globulin. ])recipittited in s])lu'r()ids by dialysis and by dilu- 

 tion as a coherent deposit. The yield was about 5 per cent of the 

 embryo. 



