TESTING CREAM BY THE BABCOCK TEST 



^" 9 GR. 50% 

 CREAM -BOTTLE 



NECK SHOWING 



GRADUATION OF 



6^" 9 GR. 50% 



CREAM -BOTTLE 



9" 9 GR. 50% 



CREAM-BOTTLE 



FIG. 29 STRAIGHT-NECKED CREAM-BOTTLES 



