EXPERIMENT STATION BULLETINS. 383' 



(2) Bacteriological count: One cc. of milk was taken from each 

 sample and the count of the composite sample, so obtained, m'ade by 

 plating, msing the standard methods for bacteriological examination of 

 milk (2). 



(3) Wcinzirl Spore Test: The Weinzirl spore test (3) for manurial 

 pollntiou was nmde once a week upon each sample during both the pre- 

 liminaiy period and the contest proper. 



(4) Temperature: The mean atmospheric temperature from 6:00 p. 

 m. until 10:00 a. m., the period during Avhich the milk was in the hands 

 of the farmer, was obtained through the local weather bureau. 



EXPERIMENTAL CHEESE. 



Cheese was made from milk coming from farms producing low scoire 

 milk to couipare with cheese made fi'om milk coming from fann producing 

 high score milk. 



pH scores for preliminary period. 



The pH scores of the samples of milk delivered during the preliminary 

 period have been tabulated in Table 1. This represents the condition of 

 the milk as it arrived at the plant during the month of March. Few of 

 the patrons were cooling the milk during this period and the high average 

 1)H score of 73 was possible because of the moderate temperature during 

 the diay and the cool nights. The average mean temperature for the period 

 during which milk wa.s held at the farm was 31°F. 



FARM INSPECTION. 



A visit to the fa'Pins after the completion of this period revealed some 

 rather surprising conditions. The farm producing milk having the high- 

 est average keeping quality was the farm from which the least might be 

 expected if judgment were based upon the conditions under which the 

 milk was produced. The stable was dirty, poorly drained and poorly 

 lighted. The barn yard was such that cattle moving about must become 

 fouled with manuii'e and mud. The Tcdeeming featiii"es were a milk house 

 and a very careful milker. The milk showed manurial pollution in but 

 two of ten tests made. Another instance, illustrating the opposite ex- 

 treme, was a farm having ex>cellent equipment for producing a good 

 grade of milk but actually producing a milk with veiy poor keeping 

 quality. While this man had an excellent stable and everything indicated 



