ESSENTIAL OIL OF LEPTOSPERMUM. 



203 



Sample 15/5/20. 



Sample 3/10/20. 



Boiling Point. Perc^ntatje. 



Boiling Point. Percentage 



at 10 mm. 60- 90° O. 25% 



60- 90° O. 15% 



90-123 6 



90 - 125 4 



123-140 54 



125-145 48 



residue allowed to 



145-160 23 



solidify ... ... 15 



residue allowed to 



100 



solidify ... ... 10 



100 



These fractions possessed the following constants 



Sample 15/5/20. 



Sp. Gravity 

 at 15- C. 



Optical 

 Rotation 



Refractive 

 Indexat20°C. 



lstfr.60-90°C. at 10 mm. 

 2nd 90-123 

 3rd 123-140 



Sample 3/10/20. 

 lstfr. 60-90°O. at 10 mm. 

 2nd 90-125 

 3rd 125-145 

 4th 145-160 



0*8651 

 0*8875 

 0*9266 



0*8731 

 0*8905 

 0*9309 

 0*9587 



-20*65° 



- 36*80° 



- 47*50° 



-11*52° 



-22-60° 

 -34*51° 

 -11*02° 



1*4757 



1*4870 

 1*5063 



1*4760 

 1*4846 

 1*5065 

 1*5107 



Determination of Terpenes. 

 The fraction boiling at 60 - 90° 0. at 10 mm. from sample 

 15/5/20 was fractionated at 762 mm. and found to consist 

 almost entirely of a and fi pinene : — 



BoiliDsr Point ° C. 



Small fraction 156-159 

 Main fraction 160 - 164 

 Small fraction 164-169 



Sp. Gravity 

 at 15° C. 



0*8632 

 0*8651 

 0*8661 



Optical 

 Rotation 



-8'78 

 -14*50 

 -24*05 



Refractive 

 [ndexat20°C. 



1-4719 

 1*4747 

 1*4751 



The portion boiling at 156 — 159° O. gave an excellent 

 yield of nitrosochloride of melting point 104° C, which after 

 careful purification melted and decomposed at 109° O. The 

 other two fractions whose constants agree well with those 

 for P pinene 1 were mixed and 5 c.c. shaken with 12 grms. 



1 Parry's Essential Oils, 2nd Vol. p. 37. 



