154 



Oil of IVarciSSllS .Tonqililla (jonquil). Extracted from the- 

 flowers by ether. — Yellow, of butter consistence, of pleasant smell 

 of the flowers. 



[Oil of Nasturtium officinale. Obtained by distillation. — Boils 

 between 120-280°. Consists in the main of Cig HgN, which boils 

 at 253-3°, and is of 1-0014 sp. gr. at 18'.— Hoffman.] 



Oil Ot IVicotiana TabaCUIU (tobacco). Fixed oil of the seeds. — 

 Gold-yellow, inodorous, mild, of 0-917 density, liquid even at 

 — 15°; dissolves in 168 parts alcohol of 93 %; saponifies easily; is 

 not drying. See also Nicotianin. 



Oil of jVigella sativa. Obtained by distilling the seeds with 

 water. — Colourless, with a bluish fluorescence; lighter than water, 

 smells like a mixture of fennel and oil of bitter almonds. 



Oil of OEnauthe Pliellaurtrium. Essential oil of the fruits. — 

 Yellow or brownish, thin ; smells and tastes penetrating, similar to 

 the fruit ; is of 0-852 density, and neutral reaction. 



Oil of Olea Euroi)i¥a= Olive Oil. 



Oil of Olibanuni. Obtained by aqueous distillation. — Yellowish, 

 thin; smells turpentine-like, but pleasanter ; of 0-866 density;, 

 boils at 162°; consists of two oils, one of which contains oxygen, 

 the other being a hydrocarbon = C20 Hie- 



Oil of Orig'anuui Majoraua (sweet marjoram). Obtained from 

 the herb by aqueous distillation. — Yellow -green, of a lighter hue 

 after rectification ; of a penetrating odour of the hei-b ; of a warm- 

 ing, acrid, slightly bitter taste ; of sub-acid reaction and 0-89 

 density; boils almost constantly at 163°; forms by age or intense 

 cold a stearopten=:Ci4 H15 O5. 



Oil of Ori«'auuni YUl«'are (^vikl marjoram) = C5oH4oO. Ob- 

 tained like the preceding. — Pale or brown-yellow, smells strongly 

 of the herb, has an acrid aromatic taste, is neutral, of 0-86-90 

 density; forms a stearopten on keeping. 



Oil of Osniitopsis asteriscoides = Coo His Oo. Obtained 



from the flowers by aqueous distillation. — Yellowish, rectified 

 colom-less, thin; smells penetrating, unpleasant of camphor and 

 cajeput; has a burning, rancid taste; dissolves readily in alcohol; 

 has a density of 0-921; boils at 178°. 



Oil of Papaver sonmifenini (poppy). Fixed oil of the seeds. 

 — Gold-yellow, thin, has a slightly acrid taste and a density of 

 0-924 ; solidifies at — 18°; dries at the air more readily than linseed 

 oil; dissolves in 25 parts cold and in 6 parts hot alcohol; saponifies 

 easily. 



[Oil of Pastinaca sativa. Obtained from the fruits of aqueous 

 distillation. — Colourless, clear, of not unpleasant odour and 



