INTESTINAL DIGESTION 2OI 



5. Preparation of an Extract of Maltase. Treat the finely divided epithelium 

 of the small intestine of a cat, kitten, or pig (embryo or adult) with about 3 

 volumes of a 2 per cent solution of sodium fluoride and permit the mixture to 

 stand at room temperature for 24 hours. Strain the extract through cloth and 

 use the strained material in the following demonstration. 



6. Demonstration of Maltase. Proceed exactly as indicated in the demon- 

 stration of lactase, p. 200, except that a i per cent solution of maltose is sub- 

 stituted for the lactose solution. The extract used may be prepared from the 

 upper part of the intestine of a cat, kitten, or pig (embryo or adult). In the case 

 of lactase, as indicated, the intestine used should be that of a kitten, puppy, or 

 pig (embryo). 



