— Ill — 



Parry learns from Bulgaria 1 ) that an adulterant of rose oil is being 

 employed there this season which has not been used previously. Parry 

 believes, however, that he has already observed it on several occasions 

 in the course of his investigations, although up to the present he has not 

 succeeded in identifying it. Only this can be said at present, that the 

 substance has a pronounced laevorotation. The oils which have been 

 sophisticated with it, as a table inserted in the article shows, have a normal 

 sp. gr. and in most cases also the proper melting-point' 2 ), but their rotation 

 is remarkably high (up to — 9°) and the alcoholic constituents are above 

 the normal (entire geraniol 78 to 81%); in some cases this also causes 

 an increase in the index of rotation. Parry hopes to be in a position shortly 

 to make further communications on the subject of this adulterant. 



Six samples of pure rose oil of the present season were found by 

 Parry to possess the following constants: d§§ 0,8570 to 0,8588, « D — 4 to 

 — 5°, n D250 1,4630 to 1,4641, after washing with water 1,4638 to 1,4651, 

 m. p. 20,5 to 22°, acid no. up to 0,18, ester no. 0,85 to 1,01, total geraniol 

 74 to 75,5 °/o. The high rotation is a noteworthy feature of these oils, as 

 generally it attains a maximum of only — 4°; they also deviate from the 

 normal in their ester-number, this value usually ranging from .8 to 16. 



Among the samples of the present season's rose oil which have so 

 far been examined in our laboratories we have only observed one with 

 a rotation exceeding — 4°; this sample gave — 4°20'. The ester-numbers 

 ranged within the usual limits, being between 9,0 and 11,2. We have not 

 up to the present met with any adulteration of the kind reported by Parry, 

 but we have repeatedly met with cases where spirit had been added; in 

 one instance, as much as 10°/o. 



Rose Oil, German. The gathering of the crop was carried out under 

 favourable climatic conditions, and we have therefore been able to com- 

 plete our stocks of oil and rose water once more. A considerable quan- 

 tity of roses has this year been worked up into extract, which is used by 

 us as the basis for our famous specialty "Red Rose, Schimmel 8j Co." 

 (seepage 152). For the manufacture of this article we have established a 

 large extraction plant, of which the capacity is practically unlimited, and 

 we are now seriously considering a further extension of our rose plantations. 



Rosemary Oil. Rosemary oil is generally required to have a specific 

 gravity of not less than 0,90, and to be dextrorotatory both for the original 

 oil and the initial fraction of 10%. English oil is an exception to this 

 rule, being usually lasvorotatory 3 ). But 'within the past few years attention 

 has been called from various quarters to the fact that lasvorotatory French 



*) Chemist and Druggist 77 (1910), 261. 

 2 ) Solidifying-point is probably meant. 



:! ) Gildemeister and Hoffmann, The Volatile Oils, p. 597; Report October 1904, 82; April 

 1908, 88. 



