EXPERIMENT STATION BULLETINS. 



409 



From the 879 isolated pure cultures, 454 were non-liquefiers, 425 liquefiers. 

 A total of 87 different species of organisms were found in butter, most of 

 them were found only once or twice. 



If we arrange all our organisms according to their frequency, we get the 

 following result: 



1 Lactic acid bacteria 157 times in 20 lots. 



2 Small irregular yeast 127 " 20 " 



3 Micrococcus lactis varians (71 + 13) 84 " 16 " 



4 Streptothrix 46 " 18 " 



5 Oidium lactis ' . . . . 44 " 14 " 



6 Penicillium glaucum 44 " 14 " 



7 Bacterium lactis Connii 38 " 16 " 



8 Aspergillus glaucus 30 " 16 " 



9 Micrococcus lactis aureus 27 " 10 " 



10 Rapidly liquefying yeast 26 " 11 " 



11 Bacillus lactis cochleatus 18 " 6 " 



12 Pink yeast 17 " 7 " 



13 Round yeast 16 " 10 " 



14 Micrococcus lactis albidus 16 " 11 " 



15 Bacterium lactis lobatum 11 " 3 " 



16 Bacterium lactis album 9 " 7 " 



17 Bacterium lactis Gorinii 9 " 4 " 



18 Maltose yeast 9 " 4 " 



19 Bacillus lactis Pruchii 8 " 3 " 



20 kinds with 736 cultures 20 lots. 



Besides these more frequent organisms, we found 



35 different Icinds 1 times 35 cultures 



14 " " 2 " 28 



3 " " 3 " 9 



7 " . " 4 " 28 " 



5 " " 5 " 25 



3 " " 6 " 18 



67 " " 143 " ' 



20 " " 736 « 



87 " " 879 " 



52 



