Vitamin Content of Raisins 



451 



The oats, milk powder and bran were mixed and autoclaved for 

 two hours at a pressure of twenty pounds and the other in- 

 gredients were added later. Inasmuch as the guinea pigs would 

 not eat the raisin preparations a water extract was prepared daily 

 in a standardized manner. 



The results obtained indicate that 



1. There is little, if any, vitamin A in Thompson seedless 

 raisins, loose Muscat raisins, seeded Muscat raisins or raisin 

 seed oil. 



2. Vitamin B is present in the Thompson seedless raisin. 

 When forty per cent, of the basal ration consisted of Thomp- 

 son seedless raisins rats grew normally. 



3. Loose Muscat raisins (with seeds) appear to be richer 

 in vitamin B than the Thompson seedless raisin, good growth 

 having been obtained on a basal ration consisting of twenty 

 per cent, of loose Muscat raisins. 



4. Seeded Muscat raisins seem to have about the same con- 

 tent of vitamin B as Thompson seedless raisins. 



5. Dried raisin seeds were not as rich in vitamin B as Thomp- 

 son seedless raisins. 



6. It is possible that a portion of vitamin B is destroyed 

 during the steaming, seeding and subsequent drying process in 

 the manufacture of seeded Muscat raisins. 



7. It was not possible to demonstrate the presence of vitamin 

 C in the Thompson seedless raisin, the loose Muscat raisin or 

 the seeded Muscat raisin. 



A detailed report of this work will be published later. 



