LETTER OF TEANSMITTAL. 



by tlie investigations made in the Bureau of Animal Industry. The 

 suggestions for preventive treatment which are given are the re- 

 sults of years of careful study of these diseases^ and if adopted will 

 do much to lessen their ravages. 



Among the more valuable papers contained in this volume are: 

 " The Tape- worm disease of Sheep of the Western Plains/' by Dr. 

 Cooper Curtice; the "Condition of the Cattle Interests west of the 

 Mississippi River," by Col. H. M. Taylor; the report on the "Num- 

 ber and Value of Pure-Bred Cattle in the United States," by E. W. 

 Perry, esq. ; and the papers prepared to accompany the exhibit of 

 animal products at the Paris Exhibition of 1889. 



In conclusion, it affords me pleasure to acknowledge the ability, 

 energy, and devotion to work shown by Dr. Theobald Smith and Dr. 

 F. L. Kilborne in conducting the experimental work, the details of 

 which are given in this report. 



Eespectfully submitted. 



D. E. SALMON, 

 Chief of the Bureau of Animal Industry. 



Hon. J.-M. RUSK, 



Secretary of Agriculture. 



