142 



Oil of Arcliaiio'elica officinalis (angelica). Obtained by 

 aqueous distillation of the root. — Colourless, lighter than water, of 

 a penetrating odour, and tastes like the root. 



[Oil of Ar«*eilI01ie Mexicsllia. Fat-oil, obtained by pressing 

 the seeds. — Light-yellow, still liquid at 5° C, of a slightly nauseous 

 odour and raw taste, diies, dissolves in live to six times its volume 

 of alcohol of 90°/g, becomes dirty-brown with concentrated sul- 

 phuric, red with nitric acid, is easily saponified.] 



Oil of Aristolocllia Serpentaria. Obtained by distillation with 

 water from the root. — Light-bi'own, lighter than water; has the 

 «mell and taste of valerian and of camphor. 



Oil of Arnica niontana. Ol^tained by distilling with water the 

 flowers and the I'oot. The former is blue or Ijrownish-green, the 

 latter brownish -yellow. 



Oil of Artemisia Absyntliinni ( wormwood) =C2o Hie O2. 



Obtained by aqueous distillation from the leaves and flowers. — 

 Dai'k-gi'een, smells and tastes of the plant, of 0'973 density, boils 

 at 205°, and dissolves readily in alcohol. When distilled with 

 ■another volatile oil, it yields to it the colouring matter. 



Oil of Artemisia Cina ami A. .Sieberi (worm seed)rz 



C-24 H20 O 2 . Obtained by aqueous distillation from the flowers. — 

 Colourless to yellowish, smells of the drug; has an acrid, burning, 

 aromatic taste; is neutral; of 0-925-945 density; boils at 175° after 

 rectification; is a mixture of einsehen ^Coq Hie, cin^eben- 

 ■stearoptenzrCoo His O2, and a little propionate of propyl. 



Oil of Artemisia Oracnncnlus (tarragon). Obtained by dis- 

 tilling the leaves with water. — Of 0-935 density; boils at 200° to 

 206° ; consists entirely or wholly of anethol. 



Oil of Artemisia vnlo-ans (mugwort). Obtained by distilling 

 the root with water. — Pale greenish-yellow ; butter-like ; crystal- 

 line ; of penetrating peculiar odour ; tastes nauseous, somewhat 

 bitter, at first burning, afterwards cooling ; neutral ; lighter than 

 water ; readily soluble in alcohol. 



Oil of Asa-fcetida. Obtained by distillation with water. — 

 Yellowish ; heavier than water ; of a strong garlic-odour; dissolves 

 to a considerable extent in water, readily in alcohol ; boils at 1 30° 

 to 140°; is a mixtiu-e of two oils C12 Hn S and C12 Hn S2. 



Oil of Asarnm EuropaiUm. Obtained by distilling the root 

 with water. — Yellowish, thickish, lighter than water (according to 

 other observations, of TOIS sp. gr.) ; smells valerian-like ; of burn- 

 ing, acrid taste, neutral ; contains oxygen. 



Oil of Aspirtium Filix mas (male fern). By treating the 

 ■ether-extract of the tubers with water containing ammonia, filicic 

 iicid passes into the watei', while the oil remains in the ether, to be 



