

NITROGENOUS FEEDING STUFFS. 107 
meal or gluten feed used were relatively large, so that as nearly 
as can be estimated, the narrow rations in the trials where cream 
gluten and King gluten meals were fed, contained about twice as 
much digestible protein per day as the wide rations (corn meal 
and wheat bran). In the majority of cases, there was a de- 
cided increase of milk from the use of the narrow ration. 
This was especially true where the narrow rations were made 
up of the more highly nitrogenous by-products, such as cream 
and King gluten meals. The effects of the rations showing 
the greatest range in the proportions of protein fed on the 
percentages of solids and fat, and the ratio of fat to solids not 
fat will be seen in the following table: 
Results of cow feeding experiments by the Vermont Station. 







| an n e oS » 
| e Ca eae = sa | ga. 
7.2 5 eos Si es ele 
= es a = 
oe rp dle a ae tao PACU jt Pe 
SiS en ype gol wea ed ne 
| fo % % 
_ Bran and corn, : : - Wide. 2 ia 2 BAT Aes 35 Losi oeL 2c 
Cream gluten meal, - - Narrow. | 3 | 14.10 | 4.90 | 9.20 | 1:1.88 
Bran and corn, - : Se VIE etior t lgG 60 4) 4c0G) Oe ter iehed ag 
King gluten meal, - = - Narrow. | 7 | 13.89 | 4.82 | 9.07 | 1:1.88 



The following summary of results is taken from the bulletin 
referred to: 
‘‘ The average results all agree in showing ‘a higher per cent. of fat and a lower 
per cent. of solids not fat as a result of the substitution of the by-products for 
the corn and bran. This difference is greatest on the richer foods, namely 
cream gluten meal and King gluten meal. Each of the three cows fed cream 
gluten meal and five of the seven fed King gluten meal narrowed the ratio of 
fat to solids not fat, while the two remaining did not change it. These figures 
show a general tendency of the gluten meals and feeds to produce a slightly 
richer milk. The gain, however, is too slight on the whole to lay much stress 
upon; yet it is added testimony to their worth when considered in connection 
with the decided gain in milk flow usually produced.” 
WHAT THESE EXPERIMENTS INDICATE, 
The teaching of the experiments thus summarized is that 
liberal amounts of protein and narrow rations tend to increase 
the flow of milk and to lessen the natural shrinkage due to 
advanced period of lactation. 
As to the influence of nitrogenous feeding stuffs on the com- 
position of milk, the results of the majority of the experiments 

