he 1 Bhowali, 17.5 to 19 per cent. of il are obtained from ses turpentine of Pinus 
ngifolia, the quality and the age of the resin being responsible for the variation in yield. 
eit, will perhaps _ be remembered » that, a few years back, we discovered in our 
ib ied in ane papenine oil of Pinus fongifolea a persian that, on being 
ons oric shiek gas a derivative of sylvestrene, but differs’ torn it nevertheless. 
having been purified through distillation, it boiled at 173°; dis0 0.867; fel, 12° 20°: 
In contact with the air, it oxidized far more quickly than a-pinene. A part, purified 
th ugh fractionated ‘distillation until the optical rotation was constant, was cooled — 
gown | with liquid air, when the crystals and the mother- -lye thus obtained showed again © 
; > same rotatory power. On being treated with gaseous, hydrochloric acid, the terpene 
yi elded ‘sylvestrene dihydrochloride, but there was not the characteristic blue colouring 
; acetanhydride and concentrated sulphuric acid. Besides, the specific gravity is 
er high for sylvestrene. This shows that this body is a uniform terpene, not 
aT c ibed so far and which differs from sylvestrene, as Robinson presumed. Perhaps 
it ontains still other terpenes which can be separated off only with difficulty. 
BV e obtained at the time the sylvestrene dihydrochloride from a terpene fraction 
whi 1 we had treated with potassium permanganate in order to prove the presence 
of é-pinene. The fraction that yielded the dihydrochloride boiled between 174 and 
1 Bi under ordinary pressure: diso 0.8713; ay + 8° 30’; Apzoo | 47323. Aue 
LF 
“Constants of cet Gore and of the allied terpene from Indian ‘turpentine oil. 
se eae (Wallach) . ‘ b. p. 175 to 176° dopo 0,848 [atJn + 66.32° fp 1.47573 
w terpene (Imp. sey Ai Fah Min DEB A 19% ofc djso 0.867. [a], + 12° 30’ eee 
pe Res _ (Schimmel & Co.). foe wa) DE PM TA te, 176° djs0 0.8713» [a] + 8° 30", ; M5200 1.47323 
oF 
ce j 
3 At the and of the publication the possibility is discussed of exporting Indian oil 
een tui pentine to Great Britain. This country imported the following quantities: = 
Bee < Imports of oil of turpentine into Great Britain. _ cari 
1912 1913 P14 A015 1916. 1917 
. ewts. 656216 560330 348206 529517. 430780 221 192 
‘€ 1028007 768800 542205 903381 903384 620747 
origin: cwts. ews ewtsa rh; ewtse: 9 AS rewts. 
iy igs ate a ae a 
beet 2 i ag 2 74 131 476400 249509 418 050 368575 
pi eu. AT 986!“ 33.656. «19-491. 40506), 5.229 
Mile ii3igc xs a AS TI), 32 0480). ZT 006 38099 —. 
Mead a eh Ca. 298) Bh 2 OTA Mey Mp as ye 
foreign countries 4) eke We fo 12 333 10 286 67 oe 56 976 
ert ; : 
T eR Report April 1911, 117. — %) Proceed. chem. ‘Soe. 27 (1911), 247; Report Mail 1912, 124. 
‘4 
my, 
~ 
| This | terpene has been examined more closely in the Imperial Institute. After "4 
