— 45 — 



essence of the peel. The name "terpinyl acetate", chosen from the de- 

 clarations, is to be understood as merely a matter of convenience, for 

 the product is a totally different thing from terpinyl acetate. Awaiting 

 your news, and always at your command, receiving, sir, my sincere 

 salutations, a d n 



Further comment is unnecessary. According to Parry's description 

 the oil in question was a green-brown, sweet-smelling substance, but its 

 odour was not exactly that of bergamot oil. Among its constants the 

 rotatory power in particular differed altogether from that mentioned in the 

 manufacturers' circular. Parry found the following values: di 5 o 0,8885, 

 « D ~f~36°, apparent ester v. 40°/o, fixed residue 6,2°/o. 



From his further examination Parry concludes that the preparation is 

 probably concocted from limonene, linalool, terpinyl acetate and an ester 

 of the type of ethyl citrate, and he regards it as the most dangerous 

 adulterant of bergamot oil which he has met so far, because when it is 

 mixed with an equal volume of bergamot oil a very excellent imitation of 

 the pure oil results. 



We may add to the above that if the composition of the article really 

 agrees with Parry's description of it, it should not be such a very diffi- 

 cult matter to detect this "artistic" artificial compound. 



Lemon Oil. We have been struck by the fact that several firms 

 have lately again been offering lemon oil with a guaranteed citral-content 

 of from 6 to 7 p. c. Years ago several English chemists x ) as well as our- 

 selves 2 ) called attention to the worthlessness of such a guarantee, and we 

 can only repeat to-day that according to the experience which has been 

 gained in the meantime it is impossible to guarantee a definite citral- 

 content for lemon oil, because on the one hand this factor is subject to 

 certain fluctuations, and, on the other, the result depends altogether upon 

 the method of estimation. In confirmation of these statements we set 

 forth below the citral-content of lemon oil as ascertained by the different 

 chemists who have investigated the article. Soldaini and Berte 3 ): 6,5 cc. 

 in 100 cc. oil; Parry 1 ): 5 to 6%; Burgess and Child 5 ): 4 to 7%; Gulli 

 and Stavenhagen 6 ) : 7 to 7,3%, rarely less than 6,5%; Parry 7 ): 3%; 

 Sadtler 8 ): 5,26%; Kremers and BrandeP): 4,2%; Berte 10 ): 6,85 to 7,4%; 



*) Chemist and Druggist 63 (1903), 277, 341. 

 2 ) Report October 1903, 34. 



a) Boll. Chim. Farm. 38 (1899), 537; Report April 1900, 25. 

 4 ) Chemist and Druggist 56 (1900), 376; Report Arril 1900, 24. 

 ft ) Journ. Soc. chem. Industry 20 (1901), 1176; Report April 1902, 33. 

 «) Chemist and Druggist 63 (1903), 401 ; Report October 1903, 34. 

 ^ Chemist and Druggist 63 (1903), 820; Report April 1904, 47. 

 *) Americ. Journ. Pharm. 76 (1904), 84; Report April 1904, 48. 

 ; ') Pharm. Review 22 (1904), 15, 72; Report April 1904, 47. 

 J0 ) Chem. Ztg. 29(1905), 805; Chemist and Druggist 66(1905), 682; Report October 1905, 28. 



