154 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
The results of the analyses are presented in the following series of seven tables 
showing the chemical changes in the developing cod egg during four different periods 
I. — Water and asli determinations. 
Character of eggs. 
Total 
substance j 
(grams). 
Dry substance. 
Ash. 
Grams. 
Per cent. 
Grams. 
Per cent. 
Unfertilized 
9. 7012 
0. 5737 
5. 33 
0. 058 
10.09 
24 hours after fertilization 
8. 2201 
0. 4700 
5.20 
0. 0648 
17. 17 
11 days after fertilization 
7.06005 
0. 564 
7 98 
0. 099 
17.55 
20 days after fertilization 
8. 097 
0. 5315 
6.31 
0. 1045 
19. 66 
II. — Distribution of nitrogen. 
Character of eggs. 
Total 
substance 
(grams). 
Total 
nitrogen 
(grams) . 
Percentage 
of 
nitrogen. 
Average. 
/ 0. 5405 
\ 0. 403 
/ 0.3914 
\ 0. 4299 
/ 0. 2985 
\ 0. 3225 
0.318 
0. 059568 
0. 0438 
0. 039858 
0.012048 
0. 033288 
0. 036354 
0. 029346 
11.01 
10. 80 
10. 16 
9. 77 
11.15 
11.29 
9. 52 
) 10.90 
| 9. 96 
} 11.22 
9. 52 
1 1 days after fertilization 
III . — Nitrogen in pkospho tungstic precipitate (= proteids -f- bases). 
Character of eggs. 
Total 
substance 
(grains). 
Nitrogen. 
Grains. 
Per cent. 
Average. 
\ 0. 3070 
\ . 2956 
/ . 1791 
\ . 3296 
/ . 2855 
\ . 3366 
.2251 
0. 03066 
. 02628 
.014010 
. 025842 
. 024528 
. 029784 
. 021462 
8. 32 
' 8.88 
7. 82 
7. 84 
8. 52 
8. 85 
9. 53 
} 8.60 
} 7. 83 
} 8.68 
9. 53 
24 hours after fertilization 
11 days after fertilization 
IV . — Proteid nitrogen. 
Character of eggs. 
Total 
substance 
(grams). 
Nitrogen. 
Grams. 
Per cent. 
Average. 
/ 0. 1650 
1 . 2940 
/ . 5267 
0. 012264 
7.43 
j 7. 29 
. 020828 
. 028470 
7. 15 
5.40 
} 5.33 
} 7.27 
6. 84 
\ . 5504 
J . 5535 
. 028808 
.041610 
5. 26 
7.52 
l . 654 
.2575 
. 04599 
. 01752 
7. 03 
6. 84 
V . — Distribution of nitrogen in eggs of different ages. 
... . . 
Character of eggs. 
Nitrogen in monoamido 
compounds. 
Nitrogen in form of bases. 
Nitrogen in form 
of proteids. 
Percentage to dry 
substance. 
Percent- 
age to 
total ni- 
trogen. 
Percentage to dry 
substance. 
Percent- 
age to 
total 
nitrogen. 
Percent- 
age to 
dry sub- 
stance. 
Percent- 
age to 
total 
nitrogen. 
10.90 8.60—2.30 
21. 10 
8. 60 7. 29—1. 31 
12. 07 
7. 29 
66 00 
24 hours after fertilization 
9. 96—7. 83=2. 13 
21. 37 
7. 83—5. 33=2. 50 
25. 10 
5. 33 
53. 57 
11 days after fertilization 
11.22— 8. 67=2. 55 
22. 72 
8. 67 —7. 27=1.40 
12. 48 
7.27 
64. 79 
20 days after fertilization 
9. 52—9. 53=0. 01 
9. 53 -6. 84=2. 69 
28. 25 
6. 84 
71. 84 
