120 STORRS AGRICULTURAL EXPERIMENT STATION. 
standard rations were given. Among these were Lehmann’s 
formulas for cows with different milk yields. In these rations 
the quantity of protein recommended to be fed was largely 
increased in accordance with the increase of milk product of 
different cows. The studies made by this Station, as well as those 
which have been compiled from the work of other Stations, 
tend to point out the wisdom of this system of feeding. In 
the table which follows will be found Lehmann’s German 
formulas for cows with different milk yields, and several for- 
mulas suggested by the writers. The plan of these feeding 
formulas is similar to Lehmann’s in that the protein is increased 
according as the milk yield is larger, although the increase in 
protein is less rapid in our proposed formulas. Allowance is 
thus made for the relative cheapness in this country of feed- 
ing stuffs rich in the carbohydrates. These formulas provide for 
a basal ration which shall be fed to all cows of the herd giving 
ten or more pounds of milk per day. ‘This is supposed to 
include all of the cows giving milk, except those which may 
be ‘‘ drying off’’ preparatory to calving. An increase of three- 
tenths of a pound of protein for every five pounds increase 
(above twenty pounds) in the milk flow per day is provided 
for the heavier milk producers. The carbohydrates and fat 
are at the same time increased somewhat, but not relatively as 
fast as the protein, so that the nutritive ratios of the rations 
become narrower as the milk product increases in amount. 
One possible weakness in this system of feeding is found in the 
fact that the quality of the milk is left out of consideration. 
It would doubtless be more rational to feed animals in accord- 
ance with the total amount of solids produced in the milk than 
in accordance with the milk flow, but as there is no simple and 
_ rapid means of determining the percentage of solids in the 
milk this plan is hardly feasible. The use of rations which 
shall vary in accordance with the milk product is comparatively 
simple, as it only requires that the weight of milk given from 
day to day shall be known. 
RATIONS FOR DAIRY COWS. 
It is practically impossible to formulate feeding rations that 
will be applicable for use under the great variety of conditions 
found upon different dairy farms. The kinds and quality of 

