Pharmacopoeias. 85 



Origanum Oil, Cretian (Oleum Origani cretici). Rather viscous; yellow to red- 

 brown; di5o 0.920 to 0.980; soluble in 3 parts of dilute alcohol. Phenol content at least 

 60 per cent, (determined with 5 per cent, caustic soda solution). 



Parsley Seed Oil (Oleum Petroselini) . Rather viscous; yellowish to light green; 

 dwo 1.050 to 1.100 1 ). 



x ) The limits mentioned do not quite tally with the real ones, the values ought to be 1.03 to 1.01. 



Pine Needle Oil, Siberian (Oleum Pini sibiricum). Colourless to light yellowish- 

 green; di 5 o 0,905 to 0-925; « D — 37 to — 43°; soluble in 0.5 to 1 vol. of alcohol, giving 

 a clear solution or showing only slight opalescence. 



Oil of Pinus montana, Mill. (Oleum Pini Pumilionis). Colourless to light yellow; 

 d i5 o 0.860 to 0.875 *); « D — 4.5 to — 15.5°; soluble in 5 to 7 volumes of alcohol, giving 

 a clear, or at least an only slightly turbid solution 2 ). Not more than 10 percent, 

 ought to pass over under 165° on fractional distillation. 



x ) In Tirolese oils, we have observed as low values as 0.858. 



2 ) Under certain conditions, up to 8 vols, of alcohol are required to effect complete solution. 



Rue Oil (Oleum Rutae). Colourless to yellow, generally fluorescent; di 5 o 0.833 to 

 0.847; soluble in 2 to 4 vols, of dilute alcohol, occasionally with opalescence. 



x ) The condition demanded in the previous edition of a fixed congelation-point has been dropped in the 

 present one, owing to the variable composition of various oils of rue. 



Sage Oil (Oleum Salvias). Yellowish to greenish-yellow; d 15 o 0.915 to 0.930; « D + 9 

 to 25 01 ); soluble in every volume of alcohol. 



x ) The lower limit must be reduced by -j-2°. 



Sassafras Oil (Oleum Sassafras). Yellow to reddish-yellow: di 50 1.070 to 1.080; 

 « D +2 to +4°; soluble in 1 to 2 vols, of alcohol. 



Savin Oil (Oleum Sabince). Colourless to yellowish; di B o 0.907 to 0.930; « D + 38 

 to +62°; soluble in 0.5 vols, and more of alcohol. 



Spearmint Oil (Oleum Mentha} crispce). Colourless, or yellowish to greenish-yellow; 

 di 5 o 0.920 to 0.940; « D — 35 to — 50 01 ); soluble in 1 to 1.5 parts of a mixture of equal 

 volumes of alcohol and diluted alcohol (to about 80 per cent, by volume); the solution 

 becomes turbid 2 ) on further dilution. 



*) The limits ought to be extended to about — 34 to —52°. 

 2 ) The right expression would be: opalescent to turbid. 



Spike Oil (Oleum Spicce). Yellowish; d 15 o 0.905 to 0.915 01 ); soluble in 2 to 3 parts 

 of dilute alcohol, giving a clear solution or at least one that is only slightly turbid 2 ). 



x ) The upper limit must be extended to 0.918. 



2 ) The solution must only be opalescent in the very least degree. 



Star Anise Oil (Oleum Anisi stellati) . Colourless or yellowish; d 20 o 0.980 to .0.990 ; 

 congelation-point not below 14° A ); soluble in 1.5 to 3 vols, of alcohol. 



l ) In this case, the oil must be coo|ed down to -f 10°; in some cases congelation is started by adding 

 a trace of solid anethol or of oil of anise. 



Tansy Oil (Oleum Tanaceti). Yellow to greenish-yellow, becoming brownish under 

 the influence of light and air; d i5 o 0.923 to 0.940 x ); easily soluble in alcohol. 



*) In the 3 rd edition of the supplement, the upper limit was mentioned more correctly as being 0.954, 

 since with oils produced from the dry herb values reaching 0.955 are obtained. 



