— 107 — 



The same observation applies to the slight differences in odour which 

 are observable in pumilio oil, and which occasionally lead to complaints 

 by customers that a certain parcel of oil supplied to them does not possess 

 a sufficiently fine aroma. In the case of an article such as pumilio oil, 

 which is being distilled all through the year, small deviations in scent 

 are quite unavoidable, for it is obvious that differences in the degree of 

 maturity of the material worked up will make themselves felt in the odour 

 of the oil also, which therefore varies according to the season when the 

 oil was distilled. The difference is not important, but it is of course 

 noticeable by the expert. It is quite impossible to guarantee to supply 

 pumilio oil of which the scent will always be the same. 



Oil of Pluchea foetida. The green herb of Pluchea fxtida, D. C. 

 (P. camphorata,D. C. of the Index Kewensis), N. O. Composite, yields 

 according to F. Rabak 1 ) 0,025 °/o of a pale golden-yellow essential oil: 

 d 0,9329, a D — 5,4° (in a 50 mm. tube), n D23 o 1,4845, acid v. 4,1, ester v. 44, 

 sap. v. after acet. 104. It is soluble in its own volume of 80°/o alcohol, 

 the solution turning cloudy upon the addition of 5 vols. a. m. Cineole 

 (m. p. of the iodol-compound 113°) was found to be a constituent of the oil. 



Oil of Ramona stachyoides. Ramona stachyoides (Benth.), Briquet, 

 (Audibertia stachyoides, Benth. ; Salvia mellifera, Greene) is a shrub-like labiate 

 which occurs in Southern California and is there known as "black sage". 

 The green flowering plant, distilled by Rabak 2 ), yielded 0,75°/o of a colour- 

 less oil with a camphoraceous odour, possessing the following properties: 

 d 24 o 0,9144, « D + 30,2°, n D240 1,4682, acid v. 2, ester v. 2,5, ester v. after 

 acet. 27,1, sol. in 1,5 vols. 70°/o alcohol, the solution turning turbid when 

 more than 3,5 vols, is added. At —15° 11,3% ^-camphor (m. p. 174 to 

 175°; m. p. of the semicarbazone 232 to 233°) is separated out from the 

 oil. Rabak's sample contained small quantities of formic acid in the free 

 state, while acetic acid and possibly traces of formic acid were present 

 in combination. The oil also contains about 22,5% cineole (m. p. of the 

 iodol compound 111 to 112°) and possibly pinene, thujone and borneol. 

 Its total camphor-content is about 40%. 



Rasama Oil. Rasamaoil 3 ), a volatile oil, has been found at Buiten- 

 zorg 4 ) to possess the following constants: d 26 o 0,924, « D — 51°24\ The 

 principal part of the oil appears to consist of sesquiterpenes : b. p. 250 to 258°. 



Rose Oil, Bulgarian. The Bulgarian rose oil market has during 

 "ecent months been under the influence of a pronounced lack of business, 

 and although certain wealthy firms have tried with great pertinacity to 



*) Midland Drugg. and pharm. Review 45 (1911), 485. 



*) U. S. Dep. of Agriculture, Bureau of Plant Industry, Circular No. 235, p. 14. 



3 ) The original reference contains no particulars of the parent-plant. 



*) Jaarb. dep. landb. in Ned.-Indie, Batavia 1910, 50. 



