149 



ibility, form the following sei-ies : — Camplior, rosin, masticli, 

 «allitris-sandarac, elemi, sandarac, kaurie-giim, dammara, asphalt, 

 xanthorrhcea-resin, dragon's-blood, benzoin, copal, amber, anime, 

 shellac, caoutchouc, beeswax. Gutta-]:>ercha is not dissolved. 

 {Rep. of Exil, of 1862.) According to Cloez, Eucalyptus oil contains 

 hydrocarbons and a distinct compound, EucalyptolrzCo* H20 O2, 

 obtained by repeated fractional distillations. Eucalyptol is a very 

 mobile, colourless liquid, boiling at 175°, and of 0'905 sp. gr. at 8°. 

 It rotates polarised light to the right ( [a]:^ + 10'4:2°), remains 

 liquid at — 18°; is little soluble in water, completely in alcohol, the 

 solution having a rose-like odour when highly diluted. Eucalyptol 

 is slowly acted upon by nitric acid ; convei'ted into a tarry mass 

 by concentrated sulphuric acid ; forms, when distilled with phos- 

 phoric anhydride, Eucalyptin :z:C24 H18, a liquid boiling at 165°, 

 and of 0-836 density.] 



Oil of EllR'eilia caryopliyllas (cloves). Obtained by distilling 

 the flower-buds and flowei'-stalks with water. — Colourless, but be- 

 comes coloured by age ; of the smell and taste of cloves ; of 1 "030- 

 1'060 density. Is a mixture of eugenic acid and a hydrocarbonn 

 C20 H16. The latter is obtained by distilling the crude oil with 

 potash-ley, washing the oily product, desiccating with calcium- 

 chloride, and rectifying. It is colourless, of great light-refracting 

 power; smells like oil of turpentine, biit dissolves more sparingly 

 in alcohol; is of 0-910 density; boils at 142° to 151°. 



Oil of Euoiiymus Europ-^US. Obtained by pressing the 

 seeds. — Pale-yellow; smells like rape-oil, tastes bitter, afterwards 

 rancid; has 0-938 density; solidifies at — 12°; yields the bitter 

 principle to warm water; dissolves with difficulty in alcohol with 

 an acid reaction. Contains olein, palmitin, acetin, and free benzoic 

 acid. 



Oil of Fa«'US sylvatica. (beech). Obtained by pressing the 

 seeds. — Yellow, of a mild and pleasant taste; of 0-920 density; 

 becomes thick and turbid at — 10°, solidifies at — 17°; turns 

 easily rancid. 



Oil of Fceilicilllllll officinale (fennel). Obtained by distilling 

 the fruits with water. — Pale-yellow ; smells and tastes like the 

 fruit, sweetish and aromatic; solidifies below 10°; is of 0-968 

 density at 20°; consists of a hydrocarbon isomeric with oil of 

 turpentine, boiling at 185° to 190°, and of liquid and solid 

 anethol. 



Oil of Galipea- Cusparia (angustura). Obtained by distilling 

 the bai"k with water. — Pale-yellow; smells peculiarly aromatic, 

 similar to Ligusticum; tastes at first mild, afterwards acrid; has a 

 density of 0-934; boils at 266°. Is a mixture of a hydrocarbon 

 iind an oxygenised oil. 



