On the financial aspect of the question, the two experi- 

 ments are in striking agreement as they are on other points. 

 The milk of lot I. over the whole period in each experiment 

 was produced at practically double the cost of that of lot II., 

 the selling price of the milk being the same, of course, in both 

 cases. With the slight difference in the yield of the two 

 lots, a very simple calculation will show the reader how un- 

 profitable lot I., in each experiment, has been when compared 

 with lot II. 



A criticism which may occur is that some other kind of 

 concentrated food might have given different results. It does 

 not follow, of course, that the results would be the same from 

 all foods, but the food used in these experiments was of a kind 

 which is usually employed in practice during the summer, and 

 there is no reason to believe that, if any other food had been 

 used which was similar in composition to the mixture em- 

 ployed here, the results would have varied very much. 



Quality of the milk. The effect of the two systems of 

 feeding on the butter-fat in Experiment H is shown in Table 

 XXVII. 



There was great similarity in the results from the two lots 

 of cows here as in Experiment Gr. The milk was somewhat 

 poorer in butter-fat than was the case in the previous summer 

 but the results are in effect practically the same, as far as 

 the relation between the two lots is concerned. In Experiment 

 G, the two lots were very close, what difference there was 

 being in favour of lot II. The difference between the two 

 lots is greater in Experiment H, but is again in favour of 

 lot II. It is clear that the concentrated food given to lot 

 I. produced no advantage as regards the butter-fat. This may 

 safely be inferred, but the evidence is perhaps not sufficiently 

 strong to warrant the conclusion that it actually caused a 

 reduction in the butter-fat. The milk of lot I. was slightly 

 richer in the second period of Experiment H than in the first, 

 but so it was also in the case of lot II. The improvement 



