I3t INVESTIGATION 1N MILK PRODUCTION. 
The record of Klondike affords most excellent data for 
the study of nutrient requirements near the close of a year’s 
lactation. The food given was quite constant as to quanti- 
ty, showing that the bulk of theration fairly met her feeding 
capacity, and that there was no shrinkage in the flow of 
milk or yield of butter fat, shows that there was no serious 
lack in nutriment, though there was a slight shortage to the 
37th week, as is shown by the weekly weighings. Her aver- 
age weight the first four weeks was 966, and the last four, 
94.6, being a loss of 20 pounds in 70 days. The nutrient re- 
quirements to a pound of butter fat and milk solids were as 
uniform as could be expected, in view of the constant varia- 
tions that occur in the percent fat in milk. During the 29th, 
32nd and 33rd week there was adecrease in the nutrients to 
a pound of butter fat and milk solids, but this was due toa 
reduction in the feed. The food was increased during the 
30th and 31st week and decreased the 32nd. With the in- 
crease of feed she decreased in product and the 32nd week 
she gained in milk and butter fat on the diminished ration, 
but this was the residual effect of the over-supply of nutri- 
ment the week previous. 
A similar result is observed with Duchess the 70th and 
71st week of lactation. There was a decrease in butter fat 
the 33rd, when the feeding of beet pulp began, to the close 
of the 36th week. This decrease was checked by adding 6 
pounds of pulp to the ration; but when it became necessary 
to reduce the ration the 40th week, a diminuation in butter 
fat again occurred, but with a gain in weight. A careful 
study of the food supply, product yielded, and nutrients re- 
quired to a given product, shows that the food provided was 
very close to her actual requirements. Special attention is 
invited to the daily protein supply, being on an average 
1.409 pounds and leaving only .743 of a pound of protein 
available for product and she returned a pound of milk to 
.O3 of protein, while the Wolf Lehmann standard prescribes 
.08. The average test of the milk during the time covered 
by the record was 5 per cent. Table X XVI in the 2nd Article 
gives the nutrients used to a pound of 5 per cent milk .053 
protein, .247 corbohydrates and .018 of ether extract. 
