270 APPLIED BACTEEIOLOGY 



The fat-decomposing ferment cannot be extracted or kept 

 so readily as the others. If two parts of juice be agitated 

 with one of ohve-oil, or of some fat melting below 40° C, 

 a perfect and persistent emulsion is formed immediately. 

 The fat-globules are said to be finer than those in milk. 

 Both the pancreas and its juice possess the power of 

 decomposing fats. If a particle of the pancreas be de- 

 hydrated by means of alcohol, well teased out in an 

 ethereal solution of butter-fat, and afterwards transferred 

 to a drop of tincture of litmus, a cover-glass being placed 

 above it, the litmus is seen to be reddened all round the 

 particle, due to the action of the fatty acids separated from 

 the butter. 



