152 Report of the Department of Bacteriology of the 



described with the group number M. 211.2233033 which would 

 place it as Micrococcus lactis albidus. 



After the samples of strippings had been used for plating, they 

 were then placed in a 37 degrees C. incubator and allowed to stand 

 for three days after which they were examined microscopically for 

 streptococci. Only one sample from the right side curdled under 

 this treatment while almost all of the 16 samples from the left 

 quarters curdled. This curdling was probably due to the micro- 

 coccus mentioned above. No streptococci could be demonstrated 

 by this technique, making it doubly certain that none were 

 present. 



RuthF. B. B. (No. 26).— The case of Ruth F. B. B. was quite 

 different from that of Chloe B. Ruth F. B. B. aborted her first calf 

 during the night of March 12, 1911, when she was 23 months old. 

 The udder did not fill with milk as rapidly as normal and was never 

 distended and swollen as is frequently the case. 



Table X gives the record of the examination of the milk of this 

 animal for cell content. The dotted line in Graph I (p. 149) shows 

 more clearly how rapidly the number of cells in the milk fell off after the 

 first two days. It never returned to high figures during the twelve 

 days during which she was under observation. The number of cells in 

 the colostral milk is not excessively high in this case. Many tests 

 of milk from animals in later stages of lactation have been made 

 where the counts were higher than any of these. 



A great number of fragments of cells were noticed in the milk 

 of the first few days and the cell counts for those days are only 

 approximately correct. The larger fragments were counted as 

 individual cells and the smaller ones disregarded. Similar conditions 

 have been noted in other colostral milk and occasionally in milk 

 from later periods of lactation. 



A bacteriological examination of the milk of this animal was made 

 by Mr. Ruehle in the same way that he made the examination for 

 Chloe B. (No. 7). Samples were collected from each milking from 

 March 13 to the evening milking of March 16. The average numbers 

 of bacteria per cubic centimeter for the seven tests when the plates 

 were incubated at room temperature were as follows: right front, 

 108; right hind, 9; left front, 9; left hind, 3; average of the four 

 quarters, 32. When the plates were incubated for two days longer 

 at 37 degrees C, the counts rose to the following averages: right 



