July is, 1918 Mineral Content of Southern Poultry Feeds 
133 
From Table I, which gives the mineral content of the bodies of fowls, 
may be seen the requirement in utilizable mineral needed to construct a 
given gain. From the above estimate of the quantity of feeds to produce 
a pound of gain can be estimated the amount of mineral elements con¬ 
tained in the feed. 
The mineral intake will fluctuate with the kinds of materials given in 
addition to the dry mash and the grain mixtures. By a study of the table 
of average analyses (Table II) it will be seen that milk contains quite a 
large quantity of phosphorus, calcium, sodium, and potassium, and hence 
the intake of sour skim milk, if the chicks are given all they will consume, 
supplies much in the way of mineral elements. Thus, in the first period 
58 per cent of the potassium, 63 per cent of the sodium, 6 per cent of the 
calcium 1 0.0045 P er cen ^ of magnesium, 1 42 per cent of sulphur, 68 per 
cent of chlorin, 26 per cent phosphorus, and 2 per cent of iron 1 were 
furnished by the sour skim milk. 
In the second period 52 per cent of the potassium, 67 per cent of the 
sodium, 27 per cent of the calcium, 3 per cent of the magnesium, 39 per 
cent of the sulphur, 64 per cent of the chlorin, 28 per cent of the phos¬ 
phorus, and 64 per cent of the iron were furnished by the sour skim 
milk. 
In the third period 42 per cent of the potassium, 60 per cent of the 
sodium, 13 per cent of the calcium, 1 per cent of the magnesium, 31 per 
cent of the sulphur, 53 per cent of the chlorin, 22 per cent of the phos¬ 
phorus, and 9 per cent of the iron were furnished by the milk. 
In the fourth period 41 per cent of the potassium, 57 per cent of the 
sodium, 10 per cent of the calcium, 1 per cent of the magnesium, 30 
per cent of the sulphur, 45 per cent of the chlorin, 16 per cent of the 
phosphorus, and 17 per cent of the iron were furnished by the sour 
skim milk. 
In the fifth period 40 per cent of the potassium, 68 per cent of the 
sodium, 18 per cent of the calcium, 1 per cent of the magnesium, 28 per 
cent of the sulphur, 52 per cent of the chlorin, 22 per cent of the phos¬ 
phorus, and 14 per cent of the iron were furnished by the sour skim milk. 
In the sixth period 35 per cent of the potassium, 66 per cent of the 
sodium, 15 per cent of the calcium, 1 per cent of the magnesium, 26 
per cent of the sulphur, 45 per cent of the chlorin, 20 per cent of the 
phosphorus, and 9 per cent of the iron were furnished by the sour skim 
milk. 
In the seventh period 41 per cent of the potassium, 73 per cent of 
the sodium, *7 per cent of the calcium, 1 per cent of the magnesium, 
32 per cent of the sulphur, 52 per cent of the chlorin, 26 per cent of the 
phosphorus, and 9 per cent of the iron were supplied by the sour skim 
milk. 
« 
1 It must be remembered that all the mineral elements in the grit are not liberated for use in the same 
period in which it is consumed, since all the grit will not be ground for about two weeks. 
