KJELDAHL PROCESS 343 



The amount of protein corresponding to the percentage of 

 total nitrogen estimated in this way may be found by multi- 

 plying the percentage by the factor 6-37.* 



* Assuming the percentage of nitrogen in protein to be, on an average, 15*7, 

 the amount of protein corresponding to a given weight of nitrogen x will be 



XX i^ = ;rx6-37 

 157 



FURTHER REFERENCES. 



Abderhalden : " Lehrbuch der physiologischen Chemie," Berlin, 1909. 



Barger : " Bases of Biochemical Interest Developed from the Proteins," 

 " Science Progress," 1911, 6, 221. 



Cathcart : " The Physiology of Protein Metabolism," London, 1912. 



Cohnheim : " Chemie der Eiweisskbrper," Braunschweig, 1911. 



Ehrlich: " Biochem. Zeitsch.," 1911, 36, 477. 



Ehrlich u. Pistschimuka : " Ber. deut. chem. Gesells.," 1912, 45, 1006. 



Fischer : " Untersuchungen iiber Aminosaiiren, Polypeptide und Proteine," 

 Berlin, igo6. 



Halliburton: " Chemistry of the Cell Nucleus," "Science Progress," 1909, 



4. 197- 



Jones: "Nucleic Acids," London, 1914. 



Puriewitsch: "Biochem. Zeitsch.," 1912, 38, i. 



Plimmer : "The Chemical Constitution of the Proteins," London, 1912 and 



1913. 



Rosenheim : " The Biochemistry of Animals and Plants," " Science Pro- 

 gress," 1908, 2, 676; 3, 106. 



Schryver : "The General Characters of the Proteins," London, 1909. 



