20 
The Bulletin 
TABLE XI 
This table gives the total amount of mineral in the droppings for each 
period. 
Period 
K 
Na 
Ca 
Mg 
Fe 
P 
S 
Cl 
Total 
Droppings 
Grams 
First... -- 
1.9847 
1.0445 
16.7695 
2.3497 
0.0020 
3.8349 
0.6728 
0.7905 
168.2 
Second_ --- 
5.7272 
2.2206 
15.9995 
5.1619 
.0203 
8.3507 
2.3389 
2.0876 
369.5 
Third.. 
6.4260 
3.0704 
17.0000 
2.4208 
.0340 
9.1120 
1.3804 
3.1790 
340. 
Fourth_ 
7.7363 
4.5841 
30.4734 
2.6014 
.0314 
16.941 
1.8724 
2.8585 
524.5 
Fifth.. 
9.5486 
3.7437 
32.1895 
3.6274 
.0324 
14.9857 
2.6184 
3.4894 
541. 
Sixth.. 
13.1084 
5.9358 
31.8477 
5.0382 
.0448 
18.0121 
3.0062 
3.4293 
641. 
Seventh_ 
13.3769 
4.4705 
21.7299 
3.3716 
.0233 
16.6019 
3.3460 
3.8460 
641. 
Eighth_ 
16.5110 
5.9803 
33.2590 
5.9882 
.0395 
19.2760 
4.0527 
4.5030 
790. 
DISCUSSION 
In a study of the mineral content of poultry feeds, it is noted that the 
different samples from products grown in different sections of the coun¬ 
try, or even different sections of the State, and on different plots of 
ground, vary in their inorganic content. Thus, an average of a large 
number of analyses from different lots of the same kind of feeds has been 
given to show the average of these specific analyses, and later a tabula¬ 
tion of the analyses of just the feeds used in these experiments. The 
latter table will enable one to definitely determine just the amount of 
mineral taken in during these feeding experiments under discussion. 
Not only may poverty of the soil affect the mineral content of the feed, 
but also seasonal variations from year to year, such as drought. 
In the baby chick the bones are very thin walled and bend easily, 
rather indicating that thorough calcification has not taken place in 
all parts. It is expected that later in the chick’s life there would be a 
greater amount of mineral in the bones, and, consequently, a greater 
percentage in the total weight of the bird. If the results of the analyses 
which were carried on with the bodies of baby chicks, and of one and 
one-half pound broilers are studied, it will be noted that there is a mate¬ 
rial increase of the greater essential inorganic constituents of the bone, 
namely—calcium, magnesium, and phosphorus. The baby chick is 
provided with down which has gradually been replaced with a coat of 
feathers as the chick develops, and this calls for an increase of sulphur. 
It is noted also that in this element there has been a material increase. 
* 
If it is desired to carry out this comparative study a step further, as 
the bird develops to maturity, it can be seen that there is a still greater 
increase in calcium, magnesium, phosphorus, and sulphur. The iron 
content is only slightly increased as the bird develops to maturity. 
i 
