MILK AFFECTED BY DAIRY PRACTICES. 71 
TABLE 20. 
Number of Bacteria per cubic centimeter* of milk before and 
after feeding hay and grain. 




sid old’ Wet 
NUMBER OF EXPERIMENT. Date. Kind of Sample. go 5 g me 
ag “g oc 
ea fa 00 
Belg? A - = - | May 4 | Before feeding 352 46 15 
i rare - 2 2 - | May 41] After feeding 1,452 552 44 
os = 2 - - | May 13 | Before feeding | 2,360 | 1,080 | 100 
y : - - - | May 13 | After feeding 2,650 700 | 300 
3) 7+ z < S - | May 17 | Before feeding | 1,866 733 33 
3, - - - - - | May 17 | After feeding 25303 616 | 83° 
4, - . “ = =erMays £70) belore. feedings 2, O17 {15 100, 133 
Bee re ~ _ Z - | May 17 | After feeding BRAT 2 ATT. We L883 
Ra) ee a ee Z - | May 18 | Before feeding g50 633 17 
eur’ : Z : - | May 18 | After feeding ZOOL O33: (117 
O25 - 4 é - | May 18 | Before feeding | 4,133 | 1,150 | 350 
o>: = : = - | May 18 | After feeding Veo Lee JOOm Aso 
Averages, - - - — Before feeding | 2,096 790 | 108 
Averages, s si — After feeding 8,506 | 1,320 | 196 
Increase caused by feeding, — _ 1,410 5380 | 88 






* One. cubic centimeter of milk equals about 20 drops. 
It will be noticed in the column marked “‘ total bacteria’’ 
_ that the number contained in the milk drawn before the fegd- 
ing was done is in each case smaller than was obtained in the 
milk drawn after the feeding had been done. In some cases 
the difference is very striking. The average number of bac- 
teria found in the milk drawn before the feeding was done is 
2,096 per cubic centimeter while the average for the milk 
drawn after the feeding had been done is 3.506 per cubic cen- 
timeter, making a difference in favor of not feeding previous 
to milking of 1,410 bacteria per cubic centimeter. These 
relative numbers are shown by the accompanying diagram. 
Diagram showing the above averages for the total bacteria. 
Before feeding, 
After feeding, 
Average increase 
caused by feeding, 

