Lffent'ml Oil of Rofa. 340 



but will be apparent and predominate in fpite of every art.. 

 In Cafhemire they feldoni life fandal to adulterate the attar ; 

 but I have been informed, to increafe the quantity, they 

 diftiil with the fofes a fweet-fcentcd grafs, which docs not 

 communicate any unpleafant fccnt, and gives the attar a 

 clear high green colour : this effence alio does not congeal 

 in a flight cold, as that of rofes. Many other ways of adul- 

 teration have been pracYifed, but all fo grofs and palpable 

 that I fhall fay nothing of therm; 



The quantity of effential oil to be obtained from the roles is 

 very precarious and uncertain, as it depends not oniy on the 

 (kill of the difliller, but alfo on the quality of the rofes and 

 the favourablenefs of the feafon : even in Europe, where. 

 the chemifis are fo perfect in their buiinefs, fome, as Tache- 

 nius, obtained only half an ounce of oil from one hundred 

 pounds of roles. — liombcrg obtained one ounce from the 

 fame quantity ; and Hoffman above two ounces. — The rofes 

 in thole initances were ftripped of their calyxes, and only the 

 leaves ufed. In this country nothing like either can be had ; 

 and to obtain four madias (about one drachm and half) from 

 eightv pounds, which, deducting the calyxes, comes to 

 fomething lefs than three drachms per hundred pounds of 

 rofe-leaves, the feafon nmft be very favourable, and the ope- 

 ration carefully performed. 



In the year 1787 I had only fixteen tolahs, or about eight 

 ounces of attar from fifty-four inaunds, twenty-three leers 

 (47,661b.) of rofes produced from a field of thirty-three big- 

 cahs, or eleven Enelifli acres, which comes to about two 

 drachms per one hundred pounds. 



The colour of the attar of rofes is no criterion of its good- 

 nefg, quality, or country. I have had, this year, attar of a 

 fine emerald green, of a bright yellow, and of a reddifh hue, 

 from the fame ground, and obtained by the fame procefs, 

 only of rofes collected at different days. 



The calyxes do not in any (hapc dhninifh the quality pi 

 the attar, nor impart any green colour to it, though per- 

 haps 



