PROTEIN REQUIRED FOR DAIRY COWS. 153 
‘‘In the second winter’s work, 1893-4, six different herds 
were visited, and in four cases the time of study of the manage- 
ment and products of each herd was extended to twelve days. 
The analyses of the feeding stuffs were made at once, and the 
weights of nutrients were calculated.’’ ‘The herds observed 
during this winter’s work were numbered as follows: 18, 109, 
Zom2 in 32 OA and. 26, 
‘During the third winter, 1894-5, four herds were visited, 
each herd being under observation for twelve days.’’ Numbers 
O25, 31, and 32. 
‘“During the winter of 1895-6, two herds were studied in a 
similar manner.’’ Numbers 35 and 36. 
The work of the fifth winter, 1896-7, included studies of four 
herds. Numbers 39, 40, 43, and 44. 
In the winter of 1899-1900 tests were made with four herds. 
Numbers 51, 52, 55, and 56. ‘‘ The herds were fed according 
to the usual practice of the dairyman, and the amounts and 
composition of the feeds used and of the milk production were 
determined. It was found that generally a uniform grain ration 
was fed to all the cows of the herd, although in some cases it 
was varied in amount somewhat according to the yields of 
milk.’’ 
‘‘In the winter of 1900-01 four herds were included in the 
studies, and observations madein the usual manner. Numbers 
59, 60, 63, and 65.”’ 
In this discussion, the rations fed the herds before mentioned 
are designated as ‘original rations.’ At periods varying from 
two to four weeks after the original observations were made, 
twenty of the herds were fed a ration recommended by the Sta- 
tion. ‘The rations fed during the second test of the herds will 
be designated as ‘recommended rations,’ and will be referred 
to later on in this discussion. ‘The forty ‘original rations’ 
, were those found in use by Connecticut dairymen during the 
period mentioned. For convenience of study they are grouped 
into two divisions, according to the amounts of digestible pro- 
tein in the ration. ‘Those containing less than 2.01 pounds of 
digestible protein per day are placed in Table 71, and those con- 
taining more than 2.01 pounds of digestible protein per day in 
Table 72. 
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