4 CONTENTS. 



Page. 



The history of the cowpea and its introduction intf) America 43 



Introduction 43 



History 44 



A new method for the determination of nicotine in tobacco 61 



The relation of nicotine to the quality of tobacco 61 



The quantitative determination of nicotine in tobacco 62 



The proposed new method _ 64 



Preliminary experiments 64 



Description of the method 66 



Comparison of the new method with that of Kissling 67 



Conclusion 68 



Index 71 



102 



