CONTENTS. 



Page. 



General properties and composition of oleoresins 7 



Purpose of the study 8 



Kinds of oleoresins examined 8 



Methods of examination 9 



Oleoresin 9 



Volatile oil 10 



Rosin 10 



Abbreviations 11 



Results of examinations by species 11 



Pinus ponderosa Laws. (California) 11 



Literature , 11 



Examination of the oleoresin 12 



Examination of the volatile oil 12 



Physical properties 12 



Identification of the constituents 12 



Examination of the rosin 13 



Conclusions 15 



Pinus ponderosa scopulorum Engelm. (Arizona) 15 



Examination of the oleoresin 15 



Examination of the volatile oil 16 



Physical properties 16 



Identification of the constituents 16 



Examination of the rosin 17 



Conclusions 18 



Pinus sabiniana Dougl 18 



Literature 18 



Examination of the oleoresin 19 



Examination of the volatile oil 19 



Physical properties 19 



Identification of the constituents 19 



Examination of the rosin 20 



Conclusions 21 



Bibliography 21 



Pinus lambertiana Dougl 22 



Examination of the oleoresin 22 



Examination of the volatile oil 23 



Physical properties 23 



Identification of the constituents 23 



Examination of the rosin 25 



Conclusions 25 



Pinus contorta Loud 25 



Literature 25 



Examination of the oleoresin 25 



Examination of the volatile oil 26 



Physical properties 26 



Identification of the constituents 26 



Examination of the rosin 27 



Conclusions 28 



5 



