399 



An ester determination showed that there was an entire absence of both 

 esters and free acids, as no alteration in the titration value of the alcoholic potash 

 was detected. 



The specific gravity of the crude oil at \i° C. was 0-8667; the rotation 

 (7i, - + 20-5°; and the refractive index at 25° C. = 1-4815. 



On redistilling 100 c.c, only a small amount was obtained boiling below 

 160° C. Between 160-170°, 68 per cent, came over; between 170-175°, 10 per 

 cent.; between 175-183°, 9 per cent.; the thermometer then rose rapidly to 

 245°, and between that temperature and 250°, 6 per cent, distilled. 



Boiling Point. 



Per cent. 



,/ i5° r 



" 15 ^• 



D I dcm. tube 



Refractive Index 

 at 25° C. 



160-170° C. 

 170-175° C. 

 175-183' C. 



245-250° c. 



68 

 10 



9 

 6 



0-8477 

 0-S4S1 

 0-8549 

 0-9433 



+ 15-6° 

 + 39-9° 

 + 51-6° 

 + 22-7° 



1-4747 

 1-4763 

 1-4796 



1-5034 



The first fraction was again distilled when 11 c.c. were obtained boiling 

 between 156-159° C, and 27 c.c. between 159-162°. The second and third pre- 

 viously obtained fractions w^ere then added to the remainder in the flask. Between 

 162-166°, 19 c.c. came over; between 166-169°, ^0 c.c; and between 169-178° 

 8 c.c. 



Boiling Point. 



d "si" C. 1 "d I dcm. tube. 



1 



Refractive Index 

 at 23' C. 



156-159° c. 

 159-162= c. 

 162-166° c. 

 166-169° c. 

 169-178° c. 



0-8517 



O-84S7 

 0-8487 

 O-S471 

 0-8477 



- 1-8° 



+ 5-4° 

 + 26-8° 



+ 41-5° 

 + 57-0' 



I-4741 



1-4747 

 1-4760 



1-4771 

 1-4776 



The above results indicated that the lowest boiling portion was probably 

 lcevo-rotator\- pinene, the highest probably dextro-rotatory limonene, and the 

 main portion was a dextro-rotator}^ terpene boiling about 160-165° C. 



The fractions \\ere again systematically distilled, u'hen the follo\\ing results 

 were obtained: — 



Boiling Point. j C.C. of Oil. 



"d I dcm. tube. 



Refractive Index 

 at 25" C. 



156-159° c. 

 161-165° C. 

 165-171° C. 

 173-177° C. 



12 



17 

 16 



7 



- 15-5' 

 + 12-6° 



+ 39-3° 



+ 59-4° 



1-4735 

 I -4741 



1-4757 



1-4771 



This had again further separated the three main constituents. 



