TEREBINTHINATE OLEO-RESINS. 705
I- Oleo-liesims Terebinthince.—Terebinthinate Oleo-Resins.r, ^hi8 KI>AHATl ° N " ’ P R0PEKTIES ; and Composition.— At first these oleo-J ess 8 are liquid, but by age and exposure to the air they become, more orhartl K e0C l y the different varieties, solid, partly by the volatilization,s *mi/ ’ res l n lH ca ti° n the volatile oil. They have a certain generalr^y ' n taste and odour. They soften and become very fluid by heat,Sl h>n] ^ ^ lre t n the air, and burn with a white flame, and, if the
c dt v a ' r be limited, with the copious deposition of finely-divided
ajij R Jump black). They are almost completely soluble in alcoholUs Uall tl0r ’ an< ^ yiol'l by distillation a volatile oil, which passes overty ater y Wl ^ a small quantity of succinic acid and a resinous residuum,the • ^'ftiires a terebinthate flavour when digested with them; and byVe Ket Yi ^ le y 0 ^ 01 ‘ the white of an egg, or still better by that ofj ^hle mucilage, forms an emulsion with them.n an)e ortL1f Xjn Turpentine ( Terebinthina vulgaris, L. D.) — Under this°l%ii 'T oleo-resins brought from various parts of the world,iiiai,,■ frorn different species of Pinus , and, though agreeing in theAt the^ ^ le * r P ro P er ties, possessing certain distinctive characters.fr°, n v P resen t time the London market is almost exclusively suppliedIn t} le C " ^ or l'-> a small quantity only being imported from Bordeaux .v al Ue y ears 1830 and 1831 the quantities of turpentine (not of greaterand p :ln per cwt.) which were imported from the United States ra nce, were as follows:—
1830 . 1831 .
Total. 234,700 1 24 |
l'n ;r Y^® er ican or White Turpentine (the Terebenthine de Boston of thethe pi ls Procured chiefly from the Pinus palustris , partly also from$tat es US Tfeda, and perhaps some other species inhabiting the Southernlino], ‘ , b* former times, large quantities were collected in Newt° b e ’ but, the turpentine trees of that section of the Union are saidPlied Y ar, y ex hausted; and our commerce is almost exclusively sup-?! u North Carolina and the south-eastern parts of Virginia ”
'The ^ a * es dispensatory).
Pi th e , nie ''b°d of procuring this turpentine is as follows:—A hollow is cut^paee 0 f ee f a ^ ew bmhes from the ground, and the bark removed for thev lti 0ri f _ out 18 inches above it. The turpentine runs into this exca-;|>e w J 0la about March to October, more rapidly of course during
A -o- 1 f’-r.m tbfisfi hollows into casks
cats. qrs. lbs -799 3 19
317,095 1 7
317,895 0 26
about March to October, more rapiuiy ui - 0
'^ich a niCr n,on ths. It is transferred from these hollows into casksk 81 ). N- Am. Sylv. iii.; Way, Trans, of the Soc. of Arts,v ol. xxviii.
Hted , u oamel, Traite des Arbres, t. ii. p. 14, Paris, 1755). It is im-New York in casks; those from North Carolina holding'' wqg 6 Ibose from South Carolina contain 2y cwts. It is yellowisli-lS bansl 1 1 an ar °matic odour, and a warm, pungent, bitterish taste. Itf°bl We tlf n * ° r °P a( l lle - Us consistence varies, being semifluid, or, in• & s > r ’ that of a soft solid. It contains various impurities (leaves,Y" e d p/b s ’ &c.) That got from the first tappings is the best, and isjy^ tn Turpentine. Recent American turpentine is said ( United^Pensatory) to yield 17 per cent, of essential oil.