50 



Studies of Aeration Mcthods 



[Oct. 



TABLE 2 



Data pertaining to the comparative yields of ammonium nitrogen, by ihe 



NaOH-NaCl and NdCOs-NaCl aeration methods, from crystalline 



ammonio-magnesium Phosphate* 



the NaaCOg-NaCl process — the greater the proportion o£ ammonio- 

 magnesium phosphate in the refrigerated meat, the smaller the pro- 

 portion of ammonia ejected by the NaaCOg-NaCl method. The 

 data for the latter method are accordingly omitted from the tables. 



TABLE 3 



Data pertaining to the yield of ammonium nitrogen, by the NaOH-NaCl method, 



from five preparations of hashed fresh heef, at intervals during prolonged 



periods of storage at different refrigeration temperatures 



Preparation I. A. Oct. 29, 1910-Jan. 5, 191 1 at 26° F. 



B. Jan. S-Feb. 13, 191 1 in ordinary refrigeratorj 



1-23. II. 

 2-13. 'II. 



31-973 

 23-647 



33-185 

 22.398 



32.579 

 23-023 



57.39 

 75-70 



57-25 

 70.85 



57-32 

 73-28 



0.174 

 0-313 



* Data pertaining to total nitrogen in the phosphate, as determined by the 

 Kjeldahl method (0.3883, 0.2439 and 0.3465 gm. of phosphate taken) : total 

 nitrogen per gram of phosphate— 87.34, 89.64 and 88.10 (av. 88.36) mg. 



t A loss of 70.7 per cent. 



t The temperature in the ordinary house refrigerator varied between 47-58° F. 



