UNITED STATES DEPARTMENT OF AGRICUI.TURE 

 BULLETIN No. 405 



Joint Contribution ft«m the Bureau of Plant Industry, WM. A. TAYLOR, Chi^f, 

 and the Bureau of Animal Industry, A. D. MELVIN, Chief 



Washineton, D. C. 



PROFESSIONAL PAPER 



December 5, 1916 



LUPINES AS POISONOUS PLANTS 



By 



C. D. MARSH and A. B. CLAWSON, Physiologists, Drag-Plant 



and Poisonous-Plant Investigations, Bureau of Plant Industry, 



and HADLEIGH MARSH, Veterinary Inspector, 



Bureau of Animal Industry 



CONTENTS 



Page 

 Tart L— Introduction .... 1 



Part IL— £ii»erimental Worli 7 



Part nL— IMscusaion and General Con- 

 clusions 28 



literature Cited 48 



WASHINGTON 



aOVEBNM£NT PEINTING OFFICE 



191« 



