IOWA ACADEMY OF SCIENCE 
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meat products and which analyzes about 60% protein, 15% ash (largely 
bone phosphate) and 10% fat. Clover and alfalfa were the other two. 
Note that the supplemented rations not only produced larger but 
stronger pigs at birth . A studied survey of the above figures shows most 
clearly that even though the carbohydrates were limited, as in the' meat 
meal lots, the increase in protein and ash was such as to markedly in- 
fluence the size and strength of the new-born pigs. That clover and 
alfalfa should also have a marked effect is logical because these hays 
are leguminous in character, run high in protein and calcium, and also 
have an alkaline ash which is probably beneficial. 
That the litter weights should also be larger on the supplemented ra- 
tions we found. On corn alone the total litter average was 13.2 pounds; 
corn and light meat meal 14.89 ; corn and heavy meat meal 19.62 ; with 
clover 14.17 and with alfalfa 17.41. 
A further study with swine carried on in 1911-12 with yearling sows 
is derived from the data now' presented : 
effect on offspring* of feed fed pregnant swine. 
Yearlings— Ten in a Lot, 1911-12. 
Sow Record 
Offspring Record 
Pregnancy Ration 
of Sows 
Ay. Daily 
Gain 
Lbs. 
Feed Daiiy 
Av. No. 
of Pigs in 
Litter 
Av. Weight 
New 
born pigs 
Lbs. 
Vigor 
Shelled 
Corn 
Lbs. 
3 
; 
3 
CO 
Strong 
Medium 
Weak 
Dead 
Corn only __ ___ 
.586 
4.97 
None 
9.2 
1.85 
41 
35 
20 
4 
Corn + Meat Meal _ . 
.779 
4.11 
.500 
10.1 
2.42 
85 
5 
5 
5 
Corn + Linseed Oil Meal— 
.671 
4.06 
1.129 
8.8 
2.22 
76 
15 
5 
4 
The same conditions exist as in the previous year, the supplemented 
rations giving larger and stronger pigs. The meat meal ration gave 
somewhat better results than where a vegetable protein supplement, such 
as linseed oil meal, was allowed. The nutritive ration of these two rations 
was practically identical. Is the increased efficiency of the meat meal 
over oil meal due to a better constituted protein, richer in such amino 
acids as tryptophane or lysine, or is it due to a more acceptable bone 
building and vitalizing ash ? 
That the limitation of the carbohydrate was entirely overshadowed by 
the increased protein in producing larger and stronger pigs is clearly 
evident. 
