148 
BUREAl OF \.M\I\I. [NDUSTEY, 
\\ 'iii-v feeding la often attended with difficulty, as ii caihfs a stiff- 
ening of the joints and serious lameness. This condition occurred 
in the experiments of L896; and in 1897 the group fed sweet whey in 
experiment No. L was so seriously checked by this trouble that they 
were Left out of the comparison. Day calls particular attention 1<> the 
fact thai the lots receiving sour whey were not at all affected. 
[f experiment No. I is omitted in the preceding table, the average 
amount of meal saved by LOO pounds of sour whey is L1.15 pounds. 
The \ alue of whey in pork feeding is, according t<> these figures, about 
half that of skim milk. 
The following shows the results of six analyses of whey made dur- 
ing these experiments by the chemical department of the Ontario 
Agricull ui-al College: 
( 'ninpnsitimi of U'Ju //. 
whey. 
0.920 
■ 
Sugar. 
m 
Day suggests that the higher percentage of nitrogenous substances 
in the sour whey was perhaps due to evaporation of the original 
samples. 
PASTURE AND PASTURE SUBSTITUTES. 
PASTURE. 
Vahu of pastun with a grain ration, — The Utah Station has 
devoted considerable study to the effect and value of pasture for pigs 
that are on a grain ration. The pastures used were made up of 
mixed grasses and alfalfa. The Utah problem in pork production is 
defined as the use of "a minimum amount of grain and a maximum 
amount of alfalfa, milk, and whey, or oilier cheap foods." The fol- 
lowing table shows the results of four seasons" st udy of I his problem, 
where rations <>f grain and pasture and grain alone were compared: 
VaXui of pasture with grain. 
Ration. 
Total 
Ihuiy. *■**■ 
daily 
gain. 
eaten 
per i<»> 
pounds 
gain. 
Pounds. Pounds. 
■:\: 
Pounds. 
1.21" 
I'm: 
(train 
480 
These results Btrongly favor the ase of pasture when feeding i > i lt^ 
under conditions similar to those that exist in rtah. In every respect 
the pigs on pasture show better results than those that had no pas- 
ture; the total gain per head averaged 33 per cent greater for the 
"Bui. N 
