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If we examine the differences between the yields of suc- 
cessive periods, we do not perceive much uniformity. Yet 
if we calculate the average daily yield during each period, 
and estimate the falling off by percentages, we may note 
that the apparent decrease is about nine per cent. of the 
yield for a preceding period; or the same percentage may 
be calculated on the total yields. We will place in column 
the actual results tabulated, and alongside the yield of each 
period decreased by nine per cent., and this we will call the 
theoretical yield. 
FOR THE WHOLE HERD. 
Actual daily milk Theoretical daily Actual yield per Theoretical yld. 
yield: lbs. milk yield: lbs. month: Ibs. per month: lbs, 
Ist mo. 25.7 25.7 Did 771 
2nd ** 24.4 23.4 731 702 
3rd ‘‘ 22.0 21.3 659 639 
4th ‘ 19.9 19.4 597 582 
5th ‘ 17.3 17.7 518 © 530 
6th ‘ 16.5 16.1 495 483 
(hates 14.9 14.7 448 440 
Sth: ‘* 13.4 13.4 403 401 
ior: 12.3 12.2 370 365 
10th, ** tes Tint 334 333 
FOR THE COWS THAT WENT DRY BETWEEN 8TH AND 12TH MONTH. 
Actual daily milk Theoretical daily Actual yield per Theoretical yld 
yield: lbs, milk yield: lbs. month: lbs. per month: lbs, 
1st mo. 26.9 26.9 808 808 
2nd ‘‘ 29.2 24.5 757 736 
3rd ‘‘ pts bel Be 22.3 685 670 
4th ‘ 20.6 21.3 617 610 
Dili: 15:4, 18.5 560 555. 
6th ‘ 17.0 16.9 511 504. 
fh dhe 15.0 15.4 451 459: 
Bil i Py 14.0 380 418. 
Stites 11.6 12.8 348 381 
10th ‘ 10.4 11.6 012 346 
We therefore believe that the natural falling off in milk 
for each month from calving, is about 9 per cent. of the 
yield of the preceding month. 
CATTLE FEEDING EXPERIMENTS. 
The scheme of the cattle feeding experiments for the 
winter of 1885 and 1886, was two-fold: the one purpose 
being to determine the changes in live weight and milk 
yield which may be expected to occur during periods of 
even length under like food and management. The second 
purpose being to study the influence of changed foods ag 
expressed in live weight and milk yield. The cattle used 
were four Jersey cows, the same animals which appear in 
our experimental records of past years. On account of the 
pressure of other dtties in the laboratory we were unable 
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