64 BULLETIN 846, U. S. DEPARTMENT OF AGRICULTURE. 



well as for whole egg or yolk, prepared from either fresh eggs or 

 storage eggs. 



Such a plot of the results in Tables 1 to 23 is given in figure 2, the 

 dots and crosses having the same significance as in the ammonia 

 nitrogen plot (fig. 1). A line separating them has been drawn, leaving 

 six crosses below the line, and one dot above it. If there were six 

 dots above the line and one cross below it, the position of the line 

 might with justice be criticised. The fact that there are six crosses 

 below the line, however, merely shows that, in those particular 

 samples, the decomposition was not of a lipolytic nature, but was of a 

 proteolytic or fermentative nature. 



The dots and crosses between 9.5 and 13 per cent of ether extract 

 represent whole egg. Within those limits the maximum amount of 

 acidity of the fat, as indicated by the line, varies from 1.94 to 1.97 

 cubic centimeters of N/20 sodium ethylate required per gram. The 

 dots between 22 and 24 per cent of ether extract, representing yolk, 

 show a corresponding variation for acidity of the fat from 2.04 to 2.06 

 cubic centimeters of the N/20 sodium ethylate required per gram. The 

 dot at the intersection of 26.65 per cent of ether extract and 1.72 cubic 

 centimeters sodium ethylate required stands for yolk from the freshest 

 eggs obtainable. The corresponding dot for whole egg lies at the 

 intersection of 10 per cent of ether extract and 1.49 cubic centimeters 

 required. The distance below the line at which these dots are located 

 should be noted. The dots in the neighborhood of 18 and 19 per cent 

 of ether extract represent sugared yolk, while the cross at the inter- 

 section of 5.7 per cent of ether extract and 1.89 cubic centimeters of 

 N/20 sodium ethylate required represents drip. 



Again, widely separated values are selected from the plot: 



Q> = 5.0 £' = 1.90 <2"=29.0 £" = 2.10 



These may be substituted in the straight-line expression 



to give 



O/ O/f 



S ~ S> ' Q'-Q" (Q ~ Q,) 



1 90 — 2 10 

 g-1-00- 5.0-29.0 ^- 5 -°> 



The vertical distance of any point from this line in terms of cubic 

 centimeters N/20 sodium ethylate required per gram of fat will be 



#'=£-1.90- 



"1.90-2.10 

 _ 5.0 -29.0 W 



-5.0) 



Solving this equation, it becomes 





D'=S- 



0.008^-1.858 





