LETTER OF TRANSMITTAL. 



U. S. DEPARTMENT OF AGRICULTURE, 



BUREAU or ANIMAL INDUSTRY, 



Washington, D. C., May 2, 1912. 



SIR : I have the honor to transmit herewith, and to recommend for 

 publication as a bulletin of this bureau, a manuscript entitled " The 

 Action of Anthelmintics on Parasites Located Outside of the Ali- 

 mentary Canal," by Dr. B. H. Ransom, Chief of the Zoological Divi- 

 sion, and Mr. Maurice C. Hall, assistant zoologist in the Zoological 

 Division of this bureau. 



This paper details the results of some attempted medicinal treat- 

 ment of sheep for tapeworm disease, and also summarizes our knowl- 

 edge of the use of anthelmintics against parasites located outside 

 of the intestinal lumen. While the experimental results were nega- 

 tive, the evidence brought together here indicates the need of further 

 work, and this paper is intended to simplify additional work by 

 furnishing a systematic summary of all previous work. It also has 

 immediate practical utility as an aid in judging the claims made for 

 proprietary medicines. 



Very respectfully, A. D. MELVIN, 



Chief of Bureau. 

 Hon. JAMES WILSON, 



Secretary of Agriculture. 



3 



