CONTENTS. 



Page. 



General introduction 15 



Stock industry of Montana 15 



Occa.«ion and aids of the present investigation 16 



Itinerary 1" 



General range conditions 18 



Summer and winter ranges for sheep - - - 18 



Effect of alkali on stock '. 20 



Herding and other details of the management of sheep 21 



Water supply on the ranges 23 



Altitude of the ranges 24 



Climatic character of the season of 1900 25 



.Conditions under which poisoning occurs 26 



Influence of heavy rain storms 26 



Influence of snow storms 27 



Danger arising from driving or trailing sheep 27 



Influence of hunger 28 



Acclimatization of stock to the range - 28 



Influence of the state of vegetation 29 



Influence of the stage of growth of plants 29 



Yariutii m and localization of the poisonous substances in plants 30 



VariAtions in the feeding habits of stock with reference to poisonous plants. 33 



Extent of stock poisoning 34 



Experiments on rabbits 35 



Methods of prevention and remedies .,. 38 



Displacing poisonous plants by forage plants 38 



Herding stock away from dangerous areas 39 



Eradication of poisonous plants by digging 40 



Popular methods of treating poisoned animals 40 



Permanganate of potash as a chemical antidote 42 



Directions for using permanganate 47 



Method of drenching 48 



Tympanites or bloat 49 



Xon poisonous plants which are mechanically dangerous 50 



PFants poisonous to stock in Montana, or so reputed 51 



Most important poisonous species 51 



Death camas {Zygadenus venenosus S. Wats. ) 51 



Description, habitat, and distribution 51 



History as a poisonous plant 52 



Experiments 54 



Symptoms and evidences of poisoning 61 



Remedial and preventive measures 64 



Summary 64 



Tall larkspur {iJelphinium glaucum S. Wats. ) 65 



Description, habitat, and distribution 65 



History as a poisonous plant 66 



9 



