44 



BULLETIN 433, U. S. DEPARTMENT OF AGEICULTUEE. 



Table 19. — Composition expressed in terms of percentages of fresh material. 



Serial 

 No. 



Description of sample. 



Storage 

 period. 



Moist- 

 ure. 



Fat. 



Ash. 



Total 

 nitro- 

 gen. 



Am- 

 moni- 

 acal 

 nitro- 

 gen. 



Phosphorus. 



Total. 



Sol- 

 ble. 



Insol- 

 uble. 



13 



25 



14 

 26 



15 

 27 



Roiind: Right hind quarter. 

 Round: Left hind quarter .. . 



Rump: Right hind quarter. . 

 Rump: Left hind quarter . . . 



Loin: Right hind quarter . . . 

 Loin: Left hind quarter 



D.H. 



2 17 

 30 17 



2 17 

 30 17 



2 17 



30 17 



75.68 

 75.24 



74.92 

 74.36 



74.54 

 73.98 



1.85 

 1.70 



3.07 

 3.34 



3.71 

 3.64 



1.06 

 1.07 



1.03 

 1.03 



1.01 

 1.02 



3.40 

 3.45 



3.27 

 3.28 



3.27 

 3.35 



0.0083 

 .0101 



.0074 

 .0093 



.0072 

 .0085 



0.202 

 .202 



.200 

 .192 



.192 



.187 



0.154 

 .158 



.147 

 .143 



.145 

 .146 



0.048 

 .044 



.053 

 .049 



.047 

 .041 



Table 20.- 



-Composition expressed in terms of percentages of moisture-free and 

 fat-free material. 





Description of sample. 



Storage 

 period. 



Moist- 

 ture, 

 fat- 

 free 

 basis. 



Ash. 



Total 

 nitro- 

 gen. 



Am- 

 moni- 

 acal 

 nitro- 

 gen. 



Phosphorus. 



Serial 

 No. 



Total. 



Soluble. 



Insol- 

 uble. 



13 

 25 



Round: Right hind quarter . 

 Roimd: Left hind quarter . . . 



Change 



D. H. 



2 17 

 30 17 



77.11 

 76.54 



4.72 

 4.62 



15.14 

 14.97 



0. 0367 

 .0439 



0.897 



.877 



0.687 

 .687 



0.210 

 .190 





28 



-0.57 



-0.10 



-0.17 



+ .0072 



-.020 



.000 



—.020 





Rump: Right hind quarter. . 

 Rump: Left hind quarter 



Change 





14 

 26 



2 17 

 30 17 



77.29 

 76.93 



4.68 

 4.64 



14.86 

 14.77 



.0334 

 .0417 



.910 

 .859 



.668 

 .642 



.242 

 .217 





28 



-0.36 



-0.04 



-0.09 



+.0083 



-.051 



-.026 



—.025 





Loin: Right hind quarter 



Loin: Left hind quarter 



Change 





15 

 27 



2 17 

 30 17 



77.41 

 76.77 



4.64 

 4.54 



15.01 

 14.95 



.0330 

 .0379 



.881 

 .837 



.668 

 .651 



.213 



.186 





28 



-0.64 



-0.10 



-0.06 



+ .0049 



-.044 



-.017 



-.027 









Table 22 shows the composition of the sodium chlorid extract 

 expressed in terms of percentages of the moisture-free and fat-free 

 material. 



Appreciable decreases have taken place in total solids, and slight 

 decreases in organic extractives, that are similar to the changes noted 

 in Experiment No. 1 and in the autolysis experiment. 



Ash of extract shows appreciable decreases, but these changes are 

 not of great significance for reasons previously noted. 



Changes in acidity are irregular and without apparent signifi- 

 cance. 



Changes in nitrogen and phosphorus compounds will be discussed 

 in connection with Tables 24 and 25. 



Table 23 shows the composition of the fat at the beginning and end 

 of the storage period. 



All samples show appreciable increases in acidity ranging from 

 0.68 per cent in the case of the kidney fat to 1.24 per cent in the case 

 of the external fat. The increase in the acidity of the intermuscular 

 fat may be regarded as being due to the action of the enzym lipase 



