MILK AFFECTED BY DAIRY PRACTICES. 73 
‘TABLE 21. 
Number of bacteria per cubic centimeter of milk before and after 
feeding dry corn stover. 










. 3 _¢ a | ae | eee 
NUMBE oe roy abr 
eae heeds of Sd pie. © 2 y = os 3 
Ag “3 aa = 
fA aa = 
S 
Ce - - - | Feb. 8 | Before feeding 579 279 O03 70 
ts . . =| Keb, .8)) After feeding L067 7511 1,009) T2Lhiw4eg 
eae : : - | Feb. 9g | Before feeding T2033 221 4 38 
aes = “2 - | Feb. 9 |. After feeding 2 A427 1,079 O 33 
veers - - - | Keb. 17 | Before feeding 2,688 510 © 4) 166 
yee - = rl MeDaLl7 wmsaiter feeding i 725 540 8 86 
i oe - = - | Feb, 18 | Before feeding rie Ge 40 O 8 
4, - - - - | Feb. 18 | After feeding 379 121 oO 58 
5, - - - - | Feb. 22 | Before feeding 854 333 O 4 
5, - - - rey eb es) Arter feeding 1,954 633 13 8 
Averages, s — Before feeding | 1,233 297 1 | 118 
Averages, - - — After feeding 3,656 692 | 28 | 123 
Increase caused by 
feeding, = - ‘ — — 2,423 3957) 27 5 

The only change of conditions between the milk drawn before 
and after feeding the corn stover was the increased dust in the 
atmosphere. It will be noticed in the table that in all but one 
of the experiments the milk drawn after the stover was fed con- 
tained much larger numbers of bacteria than did the milk 
drawn before the feeding was done. In experiment 3 it is evi- 
dent that bacteria from some other source gained access to the 
milk in such numbers as to more than counteract the effect of 
the increased dust caused by feeding. The average for the 
samples taken before feeding is 1,233 and for the samples taken 
after feeding, 3,656 or a difference of 2,423 bacteria per cubic cen- 
timeter in favor of the milk drawn before the stover wasfed. It 
may also be noticed that there is a decided increase in the num- 
ber of acid producing organisms as a result of feeding the corn 
stover. ‘The number of liquefying organisms was in most cases 
remarkably small in these experiments but seemed to be greatly 
increased by feeding. Most of these samples of milk contained 
quite a large number of molds in addition to the bacteria, indi- 
cating that the stable atmosphere was badly contaminated by 
molds from the corn stover. ‘There seemed to be a large num- 
