In a feeding experiment with sheep conducted by two students at the Iowa State College it was found that the protein digested in sweet-clover feed alone was 69 per cent and that the addition of corn to the hay ration increased the digestibility of sweet clover to 82 per cent. Alfalfa and red clover showed similar increases of the digestibility of the protein content when corn was added to the ration. The percentage of digestibility figured for the protein in the corn was the average of a number of digestion experiments. The probability is that the digestibility of the corn was also increased by the presence of the hay in the ration, so that not all the increase in the digestibility should be credited to the hay constituents of the different rations. FEEDING EXPERIMENTS WITH SWEET CLOVER. Few agricultural experiment stations have carried on definite feeding experiments to determine the value of sweet clover compared with other feeds. The South Dakota Agricultural Experiment Station reported an experiment in which lambs were fed on sweet-clover hay in comparison with alfalfa, pea-vine, and prairie hay. In this experiment the lambs made a better gain at a less cost when fed sweet-clover hay than when fed pea-vine hay, but not as large a gain as when fed alfalfa hay. The results of this experiment are shown in Table V. Table V.--Feeding experiment with lambs in South Dakota, showing the comparative value of different kinds of hay as roughage. [Grain ration consists of oats and corn in all cases; roughage varies.] --------------+-------+--------+----------------+---------------+------- | | | Average weight.|Required for 1 | | | | |pound of gain. |Average | | +--------+-------+-------+-------+ daily | Number|Duration| | | | | gain Roughage fed.| of |of test.|At be- |At end.|Grain. | Hay. | per | lambs.| |ginning.| | | | head. --------------+-------+--------+--------+-------+-------+-------+------- | | | | | | | | | Days. |Pounds. |Pounds.|Pounds.|Pounds.|Pounds. Prairie hay | 16 | 67 | 83.6 | 107.9 | 5.09 | 2.35 | 0.36 Pea-vine hay | 10 | 67 | 83.6 | 107.3 | 5.40 | 3.15 | .35 Alfalfa hay | 5 | 67 | 81.4 | 119.4 | 3.36 | 3.02 | .56 Sweet-clover | 10 | 67 | 84.7 | 113.6 | 4.42 | 3.19 | .43 hay | | | | | | | --------------+-------+--------+--------+-------+-------+-------+-------