creasing the carotene content of the diet of a normal cow does not 

 increase her milk yield. Therefore, any farm practice which may 

 be recommended as a means of increasing, beyond certain limits, 

 the vitamin A potency of milk or butter for human food purposes 

 must have economic advantages for the farmer in addition to 

 those now recognized, or else be compensated for by 'trade" 

 considerations. 



REPORTS BY COOPERATING STATES 



Some of the cooperating State agricultural experiment stations 

 have issued separate reports which deal with some phase of the 

 vitamin A survey. The Department of Agriculture does not have 

 copies of the State reports for distribution; all requests for them 

 should be directed to the respective States. The State reports are as 

 follows: 

 Vitamin A Potency of Ohio Butter. Ohio Agr. Expt. Station, 



Wooster. 

 Vitamin A Potency of Idaho Butter. Idaho Agr. Expt. Station, 



Moscow. 

 Vitamin A Content of Louisiana Milk and Butter as Related 



to Nature of Pasture. Louisiana Agr. Expt. Station, University 



Station, Baton Rouge. 

 The Vitamin A Potency of Commercial Butters Sold in Texas. 



Texas Agr. Expt. Station, College Station. 

 Determination of the Content of Carotene and Vitamin A 



in Wisconsin Butter. Wisconsin Agr. Expt. Station, Madison. 

 Distribution of Carotene and Vitamin A in Butter-Making. 



Wisconsin Agr. Expt. Station, Madison. 

 The Vitamin A Potency of Creamery Butter Produced in 



Minnesota. Minnesota Agr. Expt. Station, University Farm, 



St. Paul. 

 Vitamin A Content of California-Produced Butter. California 



Agr. Expt. Station, Davis. 

 The Vitamin A Content of Arizona Butter. Arizona Agr. Expt. 



Station, Tucson. 

 Effect of Light on the Stability of the Carr-Price Color in 



the Determination of Vitamin A in Butter. Kansas Agr. Expt. 



Station, Manhattan. 

 Determination of Vitamin A and Carotenoids in Butterfat. 



Indiana Agr. Expt. Station, La Fayette. 



iz 



U. S. GOVERNMENT PRINTING OFFICE: 1945 — 651582 



For sale by the Superintendent of Documents, U. S. Government Printing Office, 

 Washington 25, D. C 



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