Studies in Milk Secretion. 67 



as accurate information concerning the food of each animal as 

 could be obtained without actually weighing out'daily each kind 

 of grain and coarse fodder to be given her. For the cows entered 

 in the " Economic Food Tests," to be described later, each day's 

 ration was carefull}' weighed out by the supervisor of the test, 

 and he was required to make afl&davit, the same as for the milk 

 and fat record, that, to the best of his knowledge, the cow 

 received no other food than was named in the statement. 



The names of the cows are arranged in the same manner as in 

 Table I with the same numbers and in the same order as to time 

 of test. Thus the reader can readily follow the same animal 

 through the two tables, first to ascertain the amount of milk and 

 butter fat she produced and second the quantity of food she con- 

 sumed while producing it. 



