Contents 



Page 



Foreword III 



A Nation-wide survey IV 



Summary of the results 2 



Procedures used in conducting the survey 3 



Vitamin A potency of creamery butter by 



regions 4 



Effect of storage on the vitamin A potency 



of butter 7 



Vitamin A potency of butter on retail 



markets 9 



Possibilities for improving the vitamin A 



potency of milk and butter 12 



Reports by cooperating States 14 



ii 



