Bui. 739, U. S. Dept. of Agriculture. 



Plate 1 1 , 



SsuC.-top pa 



Baoteria and colon oount per oubio centimeter. 



Open pt.1 1 . Small -t.op pai: . 



1.320,000 



790,000 



I 



320,000 



$ 



(/► .11 iii»- ■ 



440,000 



1,630,000 



29b, 000 



490,000 



(m 





Col ?.i- 



Zal 



1,940,000 



690,000 



497,000 



fi 





Colin- l!20_ 



c 



Colu-i- 



1,310,000 



520,000 





440,000 



" / 



. 



Colon- 0_ 



750.QOO 



Ciiinn- IPO 



Colja- 



460,009 



Coler- IOC 



Colon- 200 



710,000 



Coltr- 600 



Sediment Disks from Pints of Milk Produced in Dirty Barn with Uten- 

 sils not Sterilized but Washed at Once After Previous Milking. 



