Apr. IS, I9I9 Meat Extracts, their Composition and Identification 17 



The quantities of insoluble, coagulable, and ammonia nitrogen are 

 so small in all ordinary extracts that they are determined only in case 

 they are indicated in extraordinary amounts. Should an extract show 

 an unusually high nitrogen content a study of the various forms of 

 nitrogen present is essential. 



After an examination of an extract as suggested its accurate classifi- 

 cation as a true-meat extract, as a cured-meat extract, as a compound 

 extract, or as an extract of liver or spleen is possible, and at the same 

 time the addition of foreign material, such as sugar, starch, or salt, will 

 be established. 



LITERATURE CITED 

 (i) Allen, Alfred H. 



1S98. COMMERCIAL ORGANIC ANALYSIS . . . ed. 2, V. 4. Lnndoil. 



(2) Association of Official Agricultural Chemists. 



1916. report of the committee ON editing tentative and official methods 

 OF analysis. 381 p. Jour. Assoc, off. Agr. Chera., v. i, no. 4, pt. 2; v. 

 2, no. I, pt. 2; V. 2, no. 2, pt. 2; V. 3, no. 3, pt. 2. 



(3) BiGELOW, W. D. 



1905. report on the separation of meat proteids. In U. S. Dept. Agr. Bur. 

 Chem. Bui. 90, p. 126-130. 



(4) Egger, E. 



1884. UEBER EIN NEU^S UNTERSCHiJiDUNGSMERKMAL REINER NATURWEINE VON 

 WEINEN, die UNTER ZUHILFENAHME VON WASSER VERBESSERT WORDEN 



siND. In Arch. Hyg., Bd. 2, Heft. 3, p. 373-380. 



(5) EmmETT, a. D., and Grindley, H. S. 



1907. chemistry OF FLESH. (SIXTH PAPER.) FURTHER STUDIES ON THE APPLICA- 



TION OF FOLIN'S CREATIN AND CREATININ METHOD TO MEATS AND MEAT 



EXTRACTS, /n Jour. Biol. Chem., v. 3, no. 6, p. 491-516. 



(6) FOLIN, Otto. 



I910. NOTE ON THE DETERMINATION OF .\MMONIA IN URINE. In JoUT. Biol. Chem., 



V. 8, no. 6, p. 497-498. 



(7) Hammarsten, Olof. 



1904. A TE.xTBOOK OF PHYSIOLOGICAL CHEMISTRY. Translation from . . . 5th 

 German edition by John A. Mandel. ed. 4, 703 p., i pi. New York, London. 



(8) Street, John Phillips. 



1908. thirteenth report on FOOD PRODUCTS FOR 1908. MEAT EXTRACTS AND 



MEAT PREPARATIONS. In Conn. Agr. Exp. Sta. Bien. Rpt. 1907/1908. p. 

 606-672. Bibliography, p. 664-672. 



(9) Wiley, H. W., ed. 



1908. OFFICIAL AND PROVISIONAL METHODS OF ANALYSIS, ASSOCIATION OF OFFICIAL 

 AGRICULTURAL CHEMISTS. AS COMPILED BY THE COMMITTEE ON REVISION 



oi>- METHODS. U. S. Dept. Agr. Bur. Chem. Bul. 107 (rev.), 272 p., 13 fig. 

 Reprinted in 1912. 



108121°— 19 3 



