ber. These results may therefore be taken as representative 

 figures for cows under ordinary conditions. 



In the cuts given I have represented the results contained 

 in Table A in such a way that it is possible to see at a glance 

 the leading features of the results therein recorded. A word 

 in explanation of cuts i and 2 may be necessary. The first 

 column shows the number of the cow and corresponds with the 

 first column in Table A. The second column shows the scale 

 of pounds and from this it is possible to determine the average 

 daily product of any cow for any period. The figures from one 

 to twenty-one across the top show the periods and correspond 

 with the top line of figures in Table A. The curved lines run- 

 ning across the cut show the average product of milk for each 

 cow and for the whole herd. The dotted lines running parallel 

 to columns one and two represent the periods and are of use in 

 determining how much milk was given at any definite time. 

 For example suppose we wish to know how much milk cow No. 

 17 gave daily during the 8th period. Follow the curved line 

 marked 17 in first column out to the point where it crosses the 

 dotted line representing Period 8 (this point I have marked a). 

 Now this point is opposite 7.4 in column second, showing that 

 No. 17 during Period 8 averaged 7.4 lbs of milk daily. Any 

 other yield for any period may be determined in the same way. 

 Taken as a whole the curved lines by their upward or down- 

 ward variation indicate respectively an increase or a decrease 

 of daily milk product. Hence a general upward variation 

 would indicate that for some reason, most probably a change of 

 food, the cows were giving more milk. A gradual downward 

 tendency might indicate a natural shrinkage as time elapsed. 

 But a sudden downward variation would most probably show 

 a less efficient ration. With these points in mind a study of 

 Cut I and Table A may show something of value in feeding for 

 milk. 



Commencing with the first period there is a substantial and 

 very uniform shrinkage, as shown not only by the individual 

 averages (Cut i. Sec. i and 2) but also by the total yield. Sec. 

 3. This shrinkage, amounting to from five to twenty per cent, 

 can only be traced to one cause, namely, the substitution of fifty 

 pounds of Southern corn ensilage for fifty pounds of Sanford 

 ensilage. So general and so large a falli^ig off cannot be at- 



6 



