SALIVARY DIGESTION 263 



the results of the iodine test, record the time required in each 

 stage of the digestion of starch to achroodextrin under the above 

 conditions. 



e. Products of Ptyalin Digestion. The dextrins and maltose 

 produced by the action of ptyalin may be isolated by precipitat- 

 ing the former with alcohol. In the remaining solution maltose 

 may be identified by its reaction with Fehling's solution and 

 the preparation of its osazoiie with phenylhydrazine. 



