158 



mixture of hydrocarbon, isomeric with oil of turpentine, and an 

 oxygenised oil. 



Oil of Rubiis Idiicus. See Raspberry-Stearopten. 



Oil of Rutll g'raveoleus (rue). Obtained from the whole 

 plant by distillation as usual. — Colourless, has a strong smell 

 and taste of the herb, is of 0*831 density, congeals at — 1° to 

 2"^ completely to a mass of laminae, boils at 228°-230°. Is in the 

 main capryl aldehyd=:C2o H20 O2. 



Oil of Saji'apemim. By distilling the resin with water. — 

 Thin, yellow, lighter than water; fresh of a nauseous, garlic-like 

 odour, assuming by and by the smell of turpentine; yields, on 

 drying, a translucid varnish; dissolves i-eadily in alcohol. 



Oil of Salvia Oificiualis (sage). Obtained from the herb 

 by aqueous distillation. — Greenish-yellow, has the smell and taste 

 of the herb; is of 0"864 density; boils between 130° and 160°. 

 Is a mixtui-e of several oxygenised oils, also of a stearopten, 

 which forms spontaneously on keeping. 



Oil of SailllmcuS lligl'a (elder). Obtained from the flowers by 

 distillation.^ — Light-yellow, thin or of butter-consistence, smells 

 strongly of the flowers ; has a bitter, burning, afterwards cooling 

 taste ; is lighter than water. 



Oil of Sassafras 0fficilialiS=Ci8 Hio O2. Obtained from the 

 root by distillation with water. — Brownish-yellow; of a femiel-like 

 smell and taste, and 1'09 density; boils between 11.5° to 228°. 

 [Consists, accoi'ding to Grimaux and Ruotte, of Safren = C20 Hie, 

 Öafrol = C20 Hio O 4 , and a very small amount of a phenol. Safren 

 boils at 1.55°-157°, is dextro-rotating ( + 17^° for 10 centimeters), 

 and has at 0° a density of 0'8345. Safrol is optically inactive, of 

 ril41 density at 0°, and boils at 231°-233°. It must be distilled 

 in a curx-ent of hydrogen gas.] 



Oil of Sesamuill Orientale (sesame). Obtained by pressing 

 the seeds. — Light-yellow, inodorous, mikl, of '9 19 density at 23°, 

 congeals at — 5°. Sesame oil, either ^iure or mixed with oils of 

 almond or olive, assumes a beautiful transient green colour, when 

 agitated with a mixture of one-half volume of nitric and one-half 

 volume of sulphuric acid. 



Oil of Spiraea Ulmaria (meadow-sweet) =:C2o Hig O4. Ob- 

 tained from the flowers by aqueous distillation. The crude oil 

 contains also salicylous acid and a stearopten, from both of which 

 it is purified by agitating with potash-ley and subsequent rectifi- 

 cation. — Colourless, lighter than water, similar in smell to salicylous 

 acid, of a slightly burning taste, pai-tly solidifying by cold; readily 

 dissolving in alcohol. 



Oil of Storax. See Styrol. 



