P..UTERIA AND BUTTER-MAKING 2I() 



ization of the cream is a perfect remedy for the trouble. Eckles 

 found a similar case which was due to liquefying bacteria. 1 



Lardy or Tallowy Butter. If butter is kept in the sunlight 

 for a moderate length of time, it loses its color and flavor and 

 becomes of a lardy and tallowy consistency. In addition to this, 

 however, Storch has found that certain bacteria are capable of 

 producing a similar disagreeable odor in butter. 2 



Oily Butter. An organism capable of producing an oily effect 

 on the butter, which is very common in Denmark, and produces 

 considerable loss, has been discovered and studied by Jensen. 

 It is an acid organism which curdles milk readily, but when 

 growing in cream develops peculiar characteristics which give 

 a strong, unpleasant taste. The result upon butter is quite 

 disastrous. . 



Bitter Butter. Butter with a bitter taste is a rare phenom- 

 enon, but a few cases have been discovered. Here, again, the 

 trouble is due to the growth of bacteria in the cream. The 

 trouble is, undoubtedly, closely associated with that of bitter 

 milk described on a previous page. 



Moldy Butter. When butter is kept under conditions favor- 

 ing their growth, molds are not uncommon upon its surface. 3 

 These will grow especially on tfie outside of butter that is 

 packed in tubs, particularly if the conditions are moist. The 

 molds that grow are nothing more than common species, which 

 are liable to appear on any moist organic surface, if the temper- 

 ature favors their development. There is little difficulty in 

 preventing their growth by having the tubs washed in brine. A, 

 better method still is to soak the tubs in melted paraffin, the tubs 

 being dipped in a bath of paraffin melted at 250. This not only 

 prevents molding but reduces loss in the butter from evapora- 



1 Eckles. P.ul. 59, Iowa Exper. Sta., 1901. ( 

 Jensen. Cent. f. Bact., ii., p. 409, 1891. 



- Fischer. Hyg. Rund., v., p. 513, 1895. 



Storch. 18. Rep. Danish Agri. Exper. Sta., 1890. 



* Rogers. P.ul. 89, Bu. An. Ind., 1906. 



