Distilled Vegetable Oils. 195 



liL OF TANSEY, O. tanaceti. From the herb. 

 Oil of thyme, Oleiim thymi. 2 cwt. fresh flowers yield 5 oz. 

 and a half. 



Essential oil of turpenttxe. O. terebinth w(b^ P. L. 

 before 1809- From rough turpentine distilled with an equal 

 weight of water, very slightly soluble in alcohol, does not contain 

 succinic acid, the residuum is yellow rosin. 



Ethereal oil of turpentine, O, terebinthincB cBthereiinii 

 P. L, 1716. From essential oil of turpentine, distilled without 

 water in glass. 



O. TKHEB. rectificatum, P. L. 1788. Essential oil of tur- 

 pentine, distilled with four times as much water. — 2 O. t. r., P.L. 

 since 1809, O. vohtile ptni purissimum. Spirit of turpentine dis- 

 tilled with four times as much water. 



Purified oil of turpentine. O. tereb. 8 oz. alcohol 1 oz., 

 shake them together, pour off the alcohol, add a fresh quantity 

 and repeat this, a third or a fourth time, until the oil becomes 

 nearly tasteless and inodorous; but it soon recovers its own taste 

 and smell. Oil of turpentine is stimulant, diuretic, diaphoretic, 

 anthelmintic and rubefacient ; and has been found serviceable in 

 chronic rheumatism, lumbago and sciatica. It has also been used, 

 either alone, or united with hone}', against the taenia solium ; for 

 this latter purpose the dose is from half an ounce to two ounces ; 

 whilst in tne former from ten minims to a drachm is usually pre- 

 scribed. Officinal preparation. — Linimentum terebinthinae, L, 



DISTILLED VEGETABLE OILS. 



Spirit of turpentine, 7\rps, Spiritus terebintlwice. Oleum 

 terebinth in/t^ P. L. since 1809. O. pini volatile. Distilled from 

 rough turpentine, without any water; what is left in the still is 

 colophony, or brown rosin, reddens litmus, contains succinic acid. 

 Used by painters as a dryer, and also to make spirit varnishes. 

 Town drawn in carboys. Hull or Liverpool in puncheons. 



HniLE DE RAZE. Distilled from galipot or barras, without 

 vater. Sold for spirit of turpentine. 



Kbumholz on , Olrvin frviplinvm. By distillation from Hun- 

 garian balsam. 



Balsam of i i i;ik.niim,, Duhh d'rojis. I>y distilling rosin, 

 and collecting the oil in separate portions as it comes over ; first a 

 white oil, then yellow ; lastly, a thick red oil, which is the balsam; 

 stimulant, diuretic, suppurative. 



Swedish tar, RitMsinn tar, Cedria, Fir liquidn. From logs 

 of Pinus sylvestris, by distillation in a kiln ; the heat produced by 

 the combustion of one part of the wood being managed so as to 



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