THE ESSENTIAL OIL OF LEPTOSPERMUM FLAVESCENS. 



175 



The crude oils after removal of phenol, gave the follow- 

 ing results on distillation, 100 ccs. of each taken : — 



Table IT. 





Percent- 



Specific 



Optical 



Kefractive 



Sample. 



age by 



gravity at 



Rotation. 



Index, 





volume. 



15° C. 



Degrees. 



20° C. 



Hill Top, 9/11/20. 











42 - 50° C. at 10 mm. 



6 



0-8615 



+ 36-95 



1-4676 



50 - 60 



9 



0-8666 



+ 34-81 



1-4685 



60-120 



3 



0-9012 



+ 16-10 



1-4826 



120-135 



32 



0-9469 



+ 20-65 



1 5045 



135-154 



5 









154-156 



40 



0-9728 



+ 29-20 



1-5110 



Lane Cove, 19/1 1/20 (young) 











163- 190° C. at 756 mm. 



17 



0-8655 



+ 15-20 



1-4751 



190-200 



12 



0-8735 



+ 11-72 



1-4787 



200-243 



9 



0-8921 



+ 6-40 



1-4859 



243-268 



45 



0-9349 



+ 6-81 



1-5026 



268-276 



15 



0-9420 



too dark 



1-5064 



Lane Cove, 19/11/20 (old) 











163- 190° C. at 756 mm. 



29 



0-8650 



+ 13-40 



1-4744 



190-210 



8 



- 0-8792 



+ 8-83 



1-4794 



210-243 



9 



0-8905 



+ 5-25 



1-4845 



243-267 



43 



0-9308 



+ 6-00 



1-5023 



267-272 



9 



0-9416 



+ 10-20 



1-5060 



Hill Top, 26/2/21 (red and 



green) 









40 - 60° C. at 10 mm. 



21 



0-8627 



+ 33-50 



1-4689 



60-120 



10 



0-8766 



+ 21-60 



1-4765 



120-142 



34 



0-9429 



+ 24-11 



1<5039 



142-156 



24 



0-9671 



+ 32-22 



1-5072 



Residue 











Kuring-gai 5/4/21 











50 - 60° C. at 10 mm. 



28 



0-8634 



+ 4-45 



1-4735 



60-120 



24 



0-8885 



+ 3-55 



1-4822 



123-141 



41 



0-9258 



+ 7-55 



1-4999 



Blackheath, 19/4/21 











40 - 60° C. at 10 mm. 



32 



0-8581 



+ 24-81 



1-4732 



60-120 



17 



0-8944 



+ 16-52 



1-4838 



120-140 



18 



0-9468 



+ 26-00 



1-5027 



140-150 



18 



0-9705 



+ 32-20 



1-5072 



Residue 











Determination of Terpenes. — The fractions boiling at 

 60 - 90° O. at 10 mm. from the various samples of oils were 



