\1 



CONTENTS. 



PRE! U I . 



ACKNOW] I DGMENTS . 



ILLUSTRATIONS: 



Coloured Plates 



Black and White Plates 



PAGl 



\ ii 



i\ 



xiii 

 \i\ 



PART I. 



INTRODUCTORY. 



i., I NUS EUCA] YPTUS : . 



Natural Order, Myrtaceae 

 Systematic Classification Adopted . 

 Comparative Constancy of Specific Characters 

 I I vbridisation .... 



Nomenclature .... 



Geographical Distribution 

 Probable Evolution of the Species . 

 Graphical Arrangement or Evolutionary Table 



5 



7 

 13 



•4 

 '5 

 16 

 21 



PART II. 



BOTANY AND CHEMISTRY OF THE ESSENTIAL OILS 

 OF THE SPECIES. 



List of Species Investigated Arranged in Groups 

 Descriptions of the Species and their Oils 



25 

 26 531 



PART III. 



TECHNOLOGICAL AND CHEMICAL. 



fable of Physical Constants and Constituents of the Crude Oils 



Table of Average Yield ol Oil from each Species 



Alteration in Specific Gravity with Varying Temperatures 



Alteration in Refractive Index with Varying Temperatures 



The Principal Constituents of Eucalyptus Oils 



Comparative Constancy o( Oil Products 



Variation in Oils due to Aye of Trees and form of Growth 



Natural Material for Oil Distillation 



Cultivated Material for Oil Distillation 



Extraction o\ Eucalyptus Oil in Australia 



Commercial Applications o\ Eucalyptus Oils 



335 348 



349 

 353 

 354 

 355 4"J 

 4*3 

 4^7 

 429 



437 

 444 

 458 



