24 
BULLETIN 391. U. S. DEPARTMENT OE AGRICULTURE. 
S ft eggs found when commercially separating eggs into white and 
yolk usually contain more bacteria and more ammoniacal nitrogen 
than do edible frozen whole eggs, as may be seen from Table XII, 
which s umm arizes the laboratory findings in commercial products. 
The guiding principle to be followed in the grading of soft eggs 
is to reject every egg that has an odor or a yolk which shows any 
signs of deterioration other than the rupture of the vitelline 
membrane. 
EGGS WITH GREEN" WHITES. 
Eggs with green whites constituted 10.5 per cent of the rejected 
eggs, and 66.6 per cent of these were seriously contaminated. These 
results are in agreement with those obtained in a more exhaustive 
study of this type of egg. 1 The six sterile eggs in the table were 
eggs in which the opalescence characteristic of fresh whites was 
confused with the "'beginning green*" of a green white egg. 
WHITE AND MIXED ROTS. 
"White and mixed rots, or eggs with the yolk partially or entirely 
mixed with the white, are advanced forms of the soft egg. These 
eggs are generally recognizable before the candle. Only 19 passed 
the candlers at the commission house into the experimental samples. 
They showed much more infection than did the soft eggs. 2 
Table XIII, — Eggs rejected during grading. 
I. VARIATION EST BACTERIAL CONTEXT. 
Number of bacteria 
per cc. 
ii 
Description of 
sample. 
to 100 10lTO 
utoiuu ^ 1(X)0 
1.001 to 
10,000 
10,001 to 
■:..•:•: 
50.001 to 
100.000 
100.001 to Over 
500.000 | 500..000 
-_ 
z- -1 z~E 'Z 
fa I 
- - _ 
z ~ i. 
h 
z o 
= 
z - 
X =4 S 
1 
Eggs with abnormal 
odor, nor musrv 
:: -_-\? 
1 
2. 2 
2 
4.4 
1 
2. 2 
2 
15.6 13 2S.9 
45 
-cs 
12 -°,.3 1 2.2 
. 51. S 2 6.5 
b 33.3 
4.5 
45 
32 
Soft eggs 
1 
3.1 
3 9.4 
Eggs with green whites. 
Is 
■■■-. 
'is.' 2 
..... 
"«L"i 
..... 
"9.'i 
12 66.7 
1 9.1 
2 25.0 
18 
11 
Wbite-r^ 
6 75. 
H 
Eggs with adherent 
volts 
J 
- . " 1 33. 3 
3 
V'-; ■:" -j." - :\ ■> 
9 100. 
9 
-..: 
IIS 69.0 4 2.3 3 
l.sj 3 
1.8 
2 
1.2 
10 
5.S 31 1S.1 
171 
i U. S. Dept. Agr.Bul. 51. pp. 57-61. 
- The results of other examinations of white and mixed rots are given in U. S. Dept. Asx. Bui. 51, 
"i.54. 
PP- 
