151 



Oil of Julians regia. See Walnut Oil. 



Oil of JuniperilS communis =C2o Hie. Obtained by distil- 

 ling the berry-like fruits with water. — Colourless or yellowish, 

 smells strongly of the fruits; of 0-847-0'870 density; dissolves little 

 in alcohol. The oil of the ripe fruits boils at 205°; deposits on 

 keeping or in a cold place a stearopten, which is heavier than 

 water. The oil of the uni'ipe fruits contains a more volatile oil, 

 boiling at 155°, and another boiling at 205°, like the oil of the ripe 

 ones. 



Oil of JuniperilS Sabina (savin) = 0-20 Hiß. Obtained by dis- 

 tilling the branchlets with water. — Colourless, of a strong taste 

 and smell of the shrub, of 0-89-0-94 density; boils at 155°-16r. 



Oil of JliniperuS virjfiniana (pencil or red cedar). Obtained 

 by distilling the wood with water. — A soft, white, crystalline mass 

 of a peculiar aromatic smell; solidifies at 27° after desiccation, 

 distils on the main at 282°. — Mixture of a liquid hydrocarbon and 

 an oxygenised stearopten. The hydrocarbon, Cedreni^Cso H24, is 

 obtained by pressing the crude oil and rectifying the liquid 

 portion, when cedren passes over at 264°-268°, and is re-distilled 

 with metallic potassium. It is now colourless, of 0*948 density, 

 and boils at 237°. The cedar-stearopten forms white needles of 

 satin-lustre, and fuses at 79°. 



Oil of Laiirus nobilis=BAY Oil. 



Oil of Lavandula (lavender). Obtained by aqueous distilla- 

 tion from the flowers of L. Stcechas, L. angustifolia, and L. lati- 

 folia. — Pale-yellow, thin, of a pleasant smell of the flowers; has a 

 burning, bitter, aromatic, acrid taste; is neuti-al, of 0"876-0'880 

 density, boils at 185°-188°, dissolves readily in alcohol. Its com- 

 position is C30 H28 O4, but it consists of two portions, a liquid 

 and a solid one, the latter being identical with common camphor. — 

 The oil, distilled from the stalks and leaves or from the whole 

 herb, is called oil of Spike. It smells not so pleasant as oil of 

 Lavender, has a greater density and contains more stearopten. 



Oil of Ledum palustre (wild rosemary). Obtained by distil- 

 lation with water. — Consists in the main of a hydrocarbon :=C2o Hie, 

 and of an oxygenised oil. It has, fresh, the composition Cgo Hes O5 . 

 From the oil soon a stearopten crystallises, which forms colourless, 

 fine prisms of a faint odour of the herb, and somewhat similar to 

 roses and turpentime; of a warming, aromatic taste; fuses with 

 a gentle heat, sublimates at a higher temperature, and contains a 

 hydrocarbon zrC2o Hie, and its hydratezröCio Hg -F 3H0. 



Oil of Le])idium sativum (cress). Obtained by pressing the 

 seeds. — Brown-yellow, of specific taste and odour, of 0*924 

 density; becomes thick and turbid at — 6°, solid at — 15°; dries 

 slowly. 



