— 140 — 



Pimento Oil (Oleum Pimento). di B ,5o 1,030 to 1,050*), eugenol content ^ s 

 60 to 75°/o 2 ). 



J ) We have observed a minimum of 1,024 in oils distilled by ourselves. 

 2 ) We have observed up to 80°/o in our own distillates. The estimation must be carried 

 out with 3°/o solution, as otherwise the results are too high. 



Pine Oil (Oleum Pini). di 6l5 o 0,865 to 0,870*); « D — 5 to — 10°. 



a ) We have already pointed out on a previous occasion (Comp. Report October 1906, 62), 

 that of recent years numerous oils of Pinus Pumilio are brought into commerce which show a 

 lower sp. gr. and a higher opt. rot. and yet are of exquisite quality. In judging the properties 

 of an oil this fact should be taken into account. 



Pine Oil, Siberian (Oleum Pini Sibiricce). d 15l60 0,900 to 0,920; « D — 30 

 to — 42°; bornyl acetate content 30 to 40°/o. 



Geranium Oil (Oleum Geranii). d 15)5 o 0,890 to 0,906. Bourbon oils 

 0,885 to 0,895; ester content (geranyl tiglinate) of the French oils 23 to 

 29°/o, of the Algerian oils 25 to 28% and of the Bourbon oils 30 to 35 V). 



x ) We have found Algerian oils to contain from 13 up to 29,5% and Bourbon oils from 

 21 up to 33°/o geranyl tiglinate. 



Rose Oil (Oleum Rosce). d|§ 0,854 to 0,862*); « D —2 to — 4° 2 ); 

 n D25 o 1,460 to 1,465 3 ); cong. pt. + 18 to +22°, usually about 20°. 



*) The minimum limit given is too high; it should be 0,849. 



2 ) We have found oils of good quality with opt. rot. down to — 1°. Comp. also p. 108 

 of the present Report. 



3 ) The co-efficient of refraction of good Bulgarian oils, according to our experience, is 

 frequently lower; we have observed a minimum of 1,452. 



Rosemary Oil (Oleum Rosmarini). di 5 ,5o 0,895 to 0,920; « D usually 

 dextrorotatory, +1 to + 12°, English and Spanish oils are often slightly 

 lsevorotatory; sol. in 5 to 10 vols. 80% alcohol. Borneol content 10 to 

 16°/o, bornyl acetate content 2 to 5°/o. The estimation of the rotation of 

 the initial 10°/o of the distillate is omitted. 



Rue Oil (Oleum Rutce). « D + 0°13' to +2°30 M ). 



*) We have already pointed out on the occasion of our previous criticism that faintly 

 laevorotatory rue oils are occasionally met with. 



Sandalwood Oil, East Indian (Oleum Santali). di5 f5 o 0,973 to 0,984; 

 <* D — 13 to 21°. Santalol-content (Ci 6 H 24 0) not less than 90%, generally 

 92 to 98°/o. 



Savin Oil (Oleum Sabince). The oil distilled from Juniperus phcenicea 

 has a lower sp. gr. (di 5)50 about 0,890) and a lower optical rotation (« D + 4 

 to +5°) than has true savin oil 1 ). * 



*) Comp. with regard to this Report April 1906, 61; October 1906, 72; April 1907, 93. 



Spearmint Oil (Oleum Menthce viridis). « D — 36 to 50°. 



Thyme Oil (Oleum Thymi). Phenol-content 20 to 45%, to be esti- 

 mated with 5°/o solution; usually 3 parts of 70°/o alcohol are required to 

 dissolve the oil, though sometimes 10 or more. 



