5 



trees "began to dry, tlie pleasant aromatic odor dis- 

 appeared, except on "breaking a twig 1-2" or more 

 in diameter, and another quite different one took 

 its place. There was no change in the oil except 

 possible slight darkening. (Owing to its being 

 spread out in a thin layer it was impossible to 

 determine this. 



Blanches were cut off the trees as needed, 

 up to 8, diameter of about -J-" and including all 

 of the growth of the last year. The terpene odor 

 was strongest in the tops of the trees, especially 

 the new growth of the main trunk. 



The still was packed tightly on the first run 

 with 7000 grams. The other runs were made on 

 smaller quantities up to 4600g. with the idea of 

 hastening the time of extraction. This appeared 

 to be complete in two to three hours in all cases 

 except the first. Y-Trien this work is resumed a 

 quantitative determination of the yield from 

 fresh foliage will "be made. 



Purification of the oil--In this way about 

 150cc of oil were collected (not including the 

 oil dissolved in the water). This was rectified 

 . v distillation with steam, the oil coming over 

 being collected fractionally in four portions 

 of about 25cc each. The water was removed by a 



