New York Agricultural Experiment Station. 



99 



In view of these results and of the desirability of obtaining 

 samples with as little contamination as possible the following 

 studies of the germ content of udders were made with samples 

 drawn, at the close of the milking process, directly into sterile 

 test tubes. 



OBSERVED NUMERICAL CONTENT. 



Ordinarily it is desirable to present the detailed results so that 

 each student of the subject may form independent judgment 

 regarding existing relations. In the present instance limitations 

 of space and the tediousness of presenting the merely numerical 

 results from over 1,000 samples led to the collection of the data 

 under the following headings : 



Table IV. — Average Bacterial Content of Milk in Udder. 



Average germ content per cc. in 316 samples from herd of 1900-02. . 

 Average germ content per cc. in 730 samples from herd of 1910-11. . 

 Average germ content per cc. in 184 samples from herd of A. G. L. . 

 Average germ content per cc. in 1230 samples from 78 cows 



518 

 420 

 320 



428 



Since it is important to know not only the average number of 

 germs present in the udder but also the maximum number present 

 at any one time, the data have been arranged in Table V to show 

 the number of samples which contained over 1,000 germs per 

 cubic centimeter as well as the maximum number found in 

 samples from each quarter of the udder in each of three herds. 



