4lS 



STATE BOARD OF AGRICULTURE. 



OCCURRENCE IN DIFFERENT STORAGES. 



Table XV shows the occurrence of the more frequent organisms in the 

 different storages. Micrococcus lactis varians decreased in the warmer 

 storages a^ and ag, but in the colder storages it kept its frequency. The 

 orange variety, however, disappeared almost entirely. Either it was killed 

 or the long storing made it hiore similar to the real M. 1. varians. We are 

 inclined to the former explanation, since it was only with considerable dif- 

 ficulty that we were able to keep these cultures alive in the laboratory. The 

 Micrococcus lactis aureus grows apparently best in storage c-e. Whether 

 this is only accidental or due to a special quality of the storage, we cannot 

 say. M. I. albidus is rather regularly distributed. Bacterium lactis Connii, 

 rather frequent in the colder storages in November, died after this, and was 

 not frequent in February. Probably the bacteria died from their own de- 

 composition products. In the warmer storage, a, they were already dead 

 in November, also in storage d, which was unsatisfactory in the beginning; 

 in the colder storages, it grew more slowly and in November it was prob- 

 ably at the limit of its development, which naturally was followed by a de- 

 crease. Bact. I. lobatum is not especially affected by the cold. Bact. I. 

 Gorinii appears only in the February butters, just as does Bacillus I. coch- 

 leatus. This may be caused by a very slow development, but it may be 

 that they are very resistant, and though they did not increase in number, 

 were found in the last investigation, because most of the other bacteria had 

 died and they could be more easily detected on the agar plates. Bacillus I. 

 Pruchii is the most regular germ, since it occurs just once in each storage. 

 The small irregular yeast is the most interesting organism because of its fre- 



