48 STORRS AGRICULTURAL EXPERIMENT STATION. 
In the table are summarized the rations fed in the herds 
studied in the winter of 1893, together with the daily yield of 
butter during the five days of each test.. The animals were of 
different breeds, and in many ways the conditions were such 
that the results are not strictly comparable one with the other. 
In the lack of better data the results are put together in the table 
to show what light they may throw upon the question of the effect 
of protein and the nutritive ratio upon the production of butter. 
The average daily butter yields are grouped by size of the 
nutritive ratio of the rations and the weights of protein fed. 
The animals having the narrower rations produced on the aver- 
age one-tenth of a pound more of butter per day than those 
having the wider, and those having the larger amounts of protein 
gave on the average two-tenths of a pound more of butter per 
day than those having the smaller quantities of protein. Too 
much importance should not be attached to these results, as they 
may have been partly accidental and due to causes other than 
feed. It is, nevertheless, a noteworthy fact that in the cases in 
which the cows were in about the same period of lactation, the 
yields of butter decreased as the protein decreased, and as the 
nutritive ratio increased. ‘This would seem to indicate that it 
would be safe in general to feed as much or even more protein 
than called for by Wolff’s standard ration if we would obtain the 
largest yields of butter from our milch cows. It would also, 
perhaps, be wiser until we have more light than at present, to 
make our rations larger, so far as their total energy is concerned, 
than the German standard. The size of the ration suggested by 
the Wisconsin Station as a standard ration, when it is measured 
by its fuel value, may not be too large for the demands of our 
conditions. Feeding stuffs rich in carbonaceous foods (fats and 
carbohydrates) are abundant and cheap with us, and it is some- 
times difficult to utilize the foods produced on the farm without 
making a ration larger in total energy than the German standard 
calls for. 
TESTS OF 1893-94. 
In the tests of 1892-93 it is not practicable to compare the cost 
of production upon narrow and wide rations since the rations 
differed with different herds. Inthe winter of 1893-94 tests were 
made with the same herds on wide and narrow rations, and the 
financial as well as the physiological results could be observed. 
The outcome of this work is briefly given here. 


