96 



BACON. 



EXPERnrENTAL. 



Tlie fresh eleiiii resin was distilled in vacuo, the volatile oils being 

 separated from water, shaken out with dilute alkalies, dried over calcium 

 chloride, and redistilled in vacuo, only the terpene fraction being 

 collected. The terpenes were then distilled at ordinary pressure. In 

 Table I, the figures are given for series of these terpene oils representing 

 samples of resin from individual trees, all being identified by Mr. Merrill 

 from the botanical material as C. luzonicum. Under the column "Ter- 

 pene," limonene is abbreviated as L; phellandrene, represented by P, 

 stands for any terpene giving a crystalline nitrite of a melting point 

 not over 121°. I will deal with the separate phellandrenes afterwards. 



Table I. — Manila elemh from Calaoag, Tayubas. 



No. 



Ter- 

 pene. 



Boiling 

 point. 



Optical 



rotation. 



10 cm. tube. 



No. 



Ter- 

 pene. 



Boiling 

 point. 



Optical 



rotation, 



10 cc. tube. 







Degrees. 



Degrees. 







Degrees. 



Degrees. 



21 



P 



170 



-173 



4-46 



108 



P 



169 -172 



+ 96.2 



!yi 



P 



17.T 



-178 



-f 95 



105 



P 



172 -174 



+ 68.5 



67 



P 



172 



-175 



-1-134.5 



92 



P 



172 -174 



- 3.5.5 



.55 



P 



172 



-178 



-H26.0 



111 



P 



169 -170 



+ 70.5 



69 



P 



172 



-175 



-fl25.5 



98 



P 



171 -174 



-t- 30.3 



56 



P 



172 



-175 



-)- 82.2 



■ 97 



P 



172 -175 



+ 94.8 



92 



P 



170 



-178 



- 44.5 



75 



P 



171 -174 



+ 86.2 



109 



P 



170 



-173 



-H06.2 



70 



P 



171 -174 



-i-108.8 



88 



P 



171 



-174 



-H09.6 



118 



P 



169 -173 



-f 25. 



106 



P 



171 



-174 



+119. 6 



72 



P 



172 -174.2 



- 60.6 



76 



P 



169 



-172 



-i- 31.6 



81 



P 



172 -175 



-t- 12. 



78 



P 



169 



-172 



+ 31.0 



91 



P 



172 -175 



- 30.4 



80 



P 



172 



-174 



— 50.5 



120 



P 



171 -172.fi 



+ 99.7 



86 



P 



173 



-175 



+ 83.7 



84 



P 



172. 5-174 



-i- 95.8 



70 



P 



173 



-175 



— 24.4 



95 



P 



171 -172.5 



+117.5 



73 



P 



169 



-172 



+ 42.5 



74 



P 



169 -172 



+ 24.5 



117 



P 



169 



-171 



-f 46.5 



63 



P 



170 -173 



+ 84.0 



82 



P 



171 



-173 



-H09.0 



71 



P 



170 -173 



+ 95.5 



110 



P 



170 



-173 



+ 37.9 



112 



P 



172 -175 



+ 89.9 



90 



L 



175 



-176.5 



-j- 96.0 



113 



P 



168 -172 



+ 88. 



114 



P 



170 



-173 



-^ 33.3 



101 



P 



176 -178 



+ 91.8 



122 



P 



171. 



ft-174 



-f 93.5 



103 



P 



173 -175 



+ 68. 



83 



P 



171 



-174 



-1-116.0 



102 



P 



176 -179 



+ 85.2 



116 



P 



172 



-174 



-f 7.5 



85 



P 



169 -173 



+ 48.9 



77 



P 



169 



-173 



+ 65.5 



119 



P 



172 -174 



+ 54.4 



99 



P 



169 



-172 



+ 78.7 



115 



P 



173 -176 



+ 48.9 



100 



P 



172 



-174 



+ 16.0 



46 



P 



175 -177 



+ 45.3 



13 



P 



171 



-174 



-f 66. 



89 



P 



172 -175 



+ 79.6 



121 



P 



172 



-17.T 



-1- 34.3 



94 



P 



174 -176.5 



+ 91.1 



87 



P 



174 



-176 



-1- 86.8 



4 



P 



172 -174.5 



+125.6 



96 



L 



174 



-176 



-i- 89.0 



93 



P 



171 -174 



+ 85. 6 



This table is striking because it shows the very great dift'erences in 

 boiling point and especially in optical rotation of the various terpene 



