994 Report or THE First AssIsTANT OF THE 
The results obtained with nine cows during July, 1893, are 
given in table VIII. The average age of the cows was 4.9 years 
and the average time in milk 4.2 months. For the first half of 
the month oat-and pea forage was fed and for the latter half 
alfalfa forage. There was no change in the kind of hay or of 
grain throughout the month. Not quite so much hay or grain 
was fed with the alfalfa as with the oat-and-pea forage, which ~ 
made the cost: of the ration somewhat lower. Forage was fed in 
the morning and at noon, and hay at night; for the first period 
oat-and-pea forage and for the second alfalfa forage. The mixed 
grain (No. 32) consisted of five parts wheat bran, one part ground 
oats, four parts corn meal, one part wheat middlings and one 
part linseed meal, N. P. The grain represented 49.9 per cent. of 
the cost of the first ration and 48.9 per cent. of the cost of the sec- 
ond, and supplied 38.2 per cent. of the total digestible nutrients in 
the first and 29.9 per cent. in the second ration. The oat-and-pea 
forage represented 34 per cent. of the cost of the first ration and 
supplied 45.1 per cent. of the total digestible nutrients. The 
alfalfa forage represented 34.6 per cent. of the cost of the second 
ration and supplied 51.6 per cent. of the total digestible nutrients. 
There was an average gain in weight during the trial of a little 
more than 6 pounds. 
The second ration contained a little more protein and fat and 
considerably more of total nutrients; the fuel value was higher, 
and the nutritive ratio nearly the same —a trifle wider. There 
was somewhat more than the normal falling off in the milk yield. 
The milk and the fat cost a little more for the second period than 
for the first. From July 1 to 15 the highest daily average milk 
yield was 35.5 pounds and the lowest 18.4 pounds. The highest 
average per cent. of fat was 5.60 and the lowest 277. From 
July 16 to 31 the extremes in milk yield were 32.9 and 15.5 
pounds, and in percentage of fat 5.80 and 2.85. In the small 
table on page 223 will be found the composition of each food used 
in this trial. 
The results obtained from the same nine cows later in the 
season during a trial in which corn forage and alfalfa forage in 
one ration were substituted for oat-and-pea forage and part of the 
hay in the other are shown in table IX. The cows averaged in 
