TEREBINTHINATE OLF.O-RESINS.

707

^ r Pt-ntine with lb. j. of black rosin. A similar preparation is found ine shops of the United States of America, ( United States Dispensatory)a probably identical with that imported from America under thep. ,rie of Venice turpentine (Dr. Maton, in Lambert's Descrip, of the genusl >ius ,■ and Dr. A. T. Thomson, London Dispensatory).

, ierzeliu s an( l Unverdorben (Berzelius , Traitc de Cl Am. t. v. p. 477,Gnielin, Handb. d. Chem.) have submitted Venice turpentine to ex-piation, and with the following results :—

Berzelius 's Analysis.turpentine, probably composed

' °'l of _______

t J{ 0f . t ' v O oils

u in insoluble in cold oil of petro-3. &

e!, ‘ n s,) lublein cold oil of petroleum.

Old Venice Turpentine.

. Wh re

Unverdorben's Analysis.

1. Volatile oil, which readily distils.

2. Volatile oil, which distils less readily,

and has a tendency to resinify.

3. Succinic acid (small quantity).

4. Much Pinic acid.

5. A little Svlvic acid.

fi. Indifferent resin, insoluble in oil ofpetroleum.

7. Bitter Extractive.

Fresh Venice Turpentine.

op . r esin yields from 18 to 25 per cent, of volatile oil (Berzelius ,

Qii • ^t ra sburgh Turpentine (Terebinthina argentoratensis; Terebenthinep- Wron, ou Terebenthine d'Alsace, Guib.)—This is obtained from Abies the 60 ' The peasantry, in the vicinity of the Alps, collect it by puncturingtli e \ es . lc les adhering to the bark with sharp-pointed hooks, and receivingL .■I'tice in a bottle. It is afterwards filtered through a rude kind ofo' funnel (Duhamel, Traite des Arbres, t. i. p. 9.)l 1?ls ra sburgh turpentine is very fluid, transparent, of a yellowish colour,l,; t t a Ver y agreeable odour of citron, and a taste moderately acrid andIt consists, according to Caillot ( Journ. de Pharm. xvi. p. 436), ofOH 33'5, Resin insoluble in alcohol 6’20, Abietin (a crystallizable■V : t0'85 ,Abietic acid (? Pinic and Sylvie acids) 46’39, Extractive andcinic acid 0'85, Loss (principally volatile oil) 2'21.

Ilf Canadian Turpentine or Canada Balsam (Terebinthina canadensis, L.

canadense, E. D.) is obtained from Abies balsamea in Canada b s ^ a *' e °t Maine . Between the bark and the wood of the trunks^U<1 n< ^ les tl lese trees are vesicles containing this oleo-resin, whichiti Pn es when they are broken, and is received in a bottle. It is imported

. Ca sks

containing each about one cwt. In 1838 the quantity imported

<lS 7-—O--" - — '1- J -

. -59 lbs. ( Trade List for 8th Jan. 1839). When fresh it has the

thence 0 f thin honey, but by age gradually solidifies; it is yellow,ocl^ent, very tenacious, of a peculiar and agreeable terebinthinate(j ’ ail d of a slightly bitter, somewhat acrid, taste.

>i)j ^l a< ^ a balsam has been analyzed by Bonastro [Journ. de Pharm.

who obtained the following results:— Volatile oil 18'6, ResinV^Me in alcohol 40’0, Sub-resin difficultly soluble 334, Fibrous

\lf chouc, like Sub- resin 4‘0, Acetic acid traces, Bitter Extractive, andi* 4-0.o. n

j 1on imon Frankincense [Abietis resina, L. Thus. D.) This is thef >r j an eous exud'ation of Abies communis. It concretes in distinct drops,which are compact, opaque, of a deep yellow colour. What is111 the shops of London is a soft solid, having considerable re-