80 Report of the Department of Bacteriology of the 



examination of the 99 samples of whole milk and 99 samples of 

 strippings are given in Table XVI. 



Table XVI. — Bacteria in Milk from Unclipped Cows Cleaned by Hand or by 



Vacuum Cleaner. 



Grand average: Whole milk, 107; strippings, 57; difference, 140. 



In the above table the average results from two of the four cows 

 are in favor of each of the methods of cleaning and the variations 

 in the results under the two methods of cleaning are practically 

 the same for each cow. These results are so close that the grand 

 averages of the germ content of the whole milk give a balance of 

 13 germs per cc. in favor of hand cleaning and when the germs in 

 the strippings are deducted the balance becomes 9 per cc. in favor 

 of machine cleaning. Closer agreement than this could hardly be 

 expected in such experimental results. 



