New York Agricultural Experiment Station. 161 



c. cell content of the milk of animals at the end of the 



lactation period. 

 Several investigators have reported that the number of cells dis- 

 charged is greatly increased at the end of the lactation period. These 

 statements are based on very incomplete and unsatisfactory data, 

 as pointed out by Breed and Stidger. 43 Some further tests bear- 

 ing on this point have been made which are summarized in Table 

 XII. These tests, even combined with previous tests reported by 

 other investigators, are still insufficient to show what the real con- 



Table XII — Cell Content of Milk of Animals near the End of their Lactation 



Period. 



No. 



1 



2 



5 



8 



9 



10 



12 



13 



14 



17 

 19 

 20 

 23 



16 



19 

 26 

 27 

 28 



NAME. 



Anna G 



Carey of Station 



Carey Fairy 



Dolly F. B. B 



Dotshome Carey . . . . 



Gerty F. 1 



Gerty F. 2 



Gerty F. 3 



Hammond 2 



Mabel S. F 



Millie of Geneva 



Millie F 



Nora F. B. B 



Hammond F. 2 



Millie of Geneva 



Carey Fairv Queen . . . 

 Oxford Millie F. B. B 

 Mabel S. F. B. B 



Milked once 



a day on 

 these dates. 



1911 

 8-24— 9-7 



6- 7— 6-17 



7- 6— 

 6-15— 

 6- 6— 6-16 

 6-15— 6-26 

 6-19 

 6-20 



7-21 

 6-26 



6-26 

 6-30 

 8-26— 9- 9 



5-21— 5-27 



7-24— 8- 8 



6-10— 6-13 



9- 5— 9- 6 



1913 



11- 6—11-19 



10-10—10-15 



10-31—11- 7 



11- 3—11- 8 



11-23—11-28 



Milked once on 

 these dates. 



1911 

 9-9 



6-19, 20, 22, 24, 26 

 7-23 



6-28, 7-1 

 6-19, 21, 23, 26 

 6-28, 7-1 

 6-28, 7-1 

 7-2,4 

 9-11, 13, 16, 19, 22, 



25, etc. 

 5-29, 30 

 8-10 



1913 

 11-22 

 10-18 



Stripped 11-12 

 Stripped 11-12 

 Stripped 12-3 



* Number of times milked after test was made. 



ditions are. There are several of the records given in Table XII 

 which are very high and above the normal for the cows in question, 

 but in eleven out of the eighteen tests given the number of cells found 

 was less than the average number found during the height of the 

 lactation period and in three cases so few cells were present that 

 it was difficult to find any at all. 



Yet, on the other hand, the record given for Millie G. on November 

 18, 1913, of 16,950,000 cells per cubic centimeter is the highest re- 

 ported in this bulletin for mixed milk. It should be noted that 

 this was taken from the very last milking and that this cow was 



43 See footnote 1. 



11 



