PRODUCTION OF OTTO. 165 



These observations have been suggested by the difficulty 1859. 

 which occurs to the druggist in the purchase of Otto of Eose- price~oTotto. 

 The wholesale price of the article varies from 14s. to 2Gs. per 

 ounce, a fact indicative of a wide range of qualities. But as- 

 suming that the most expensive article is the purest, it will be 

 found to differ materially from the Otto described by our best 

 authors. Pereira states 1 that at temperatures below 80 F., Attar 

 of Eoses is a crystalline solid ; and the same assertion is made 

 by Dr. Royle. 2 Brande states 3 that it melts at 84 ; Eedwood, 

 that it fuses between 84 and 86. 4 Martiny gives 86 as its 

 fusing point. 5 Chevallier, Eichard, and Guillemin say that it is 

 concrete below 84 to 86. 6 Dr. Jackson states, of the Otto 

 made at Ghazeepore, that it melts at 84. 7 



Yet the Otto of the London market, as all druggists know, is 

 never found with so high a fusing-point, and, in fact, there is but Fusing point, 

 a portion of that which arrives, of which one could say that it 

 is solid above 60 F. 



These discrepant facts have long engaged my attention, and 

 believing that the general subject of Otto of Eose merits the 

 notice of pharmacists, I have placed on paper ..the observations 

 which I have collected. 



For convenience I think it best to discuss the subject under 

 three heads, namely, Production, Adulteration, and Chemical 

 Characters. First, then, the 



PRODUCTION OF OTTO OF EOSE. 



The Otto of Eose with which at the present day the English Production, 

 market is supplied, is produced in Turkey, on the plains lying 

 south of the Balkan mountains. 



1 Elements of Mat. Med. Ed. 3, vol. ii., p. 1812. 

 * Manual of Mat. Med. Ed. 2, p. 432. 



3 Manual of Chemistry. Ed. 6, p. 1551. 



4 Supplement to the Pharm. Ed. 3, p. 881. 



5 EncyTdop. d. Med.-Pharm. Nat.-und Rohwaareiik. Bd. ii., p. 389. 



6 Diet, des Drog. T. iii., p. 158. 



7 O'Shaughnessy's Bengal Dispensatory (p. 328), in which work Dr. Jack- 

 son's interesting account is given at length. 



