236 ODOROGRAPHIA. 



sulphuric acid in alcoholic solution, Tanacetoxime yields a 

 Cymidine 



CH3 4-| 



C6 H, N H, 3 I ,vhich 



by oxidation with nitrous acid yields Carvacrol, C^^H^Jd. 

 By reducing tanacetoxime with ^o^inm., Tanacetylamine, C^qH^^ 

 XH.,is produced, and dry distillation of the hydrochlorate of 

 this base yields Tanacdene, C^^oH^g. 



According to Semmler, tanacetone also occurs in other essential 

 oils, such as Sage oil (Salvia offldnalis, L.), Wormwood oil and 

 Thuja oil {Thuja occidentalis.) 



Another essential oil, resembling in odour that of Tansy, is 

 obtained from Achillea coronopifolia, Willdenow,* this is 

 called the Buck's-horn leaved Achillea, an evergreen, herbaceous 

 plant, native of the Levant. This oil is describedf as being of a 

 deep blue colour, thin consistency and sp. gr. '9 24 at 15^ C. 



An oil whi;/li in odour strongly resembles that of Tansy,is obtained 

 in Spain from the dried flower racemes and fresh young shoots of 

 Artemisia Barellieri and might probably be used as a sub- 

 stitute for oil of wormwood. Its sp. gr. at 15^ C. is reported to be 

 0-923 and its boiling point between 180° and 210° 0. 



Oil of Artemisia H is pan ica distilled from young shoots, is 

 considered to resemljle Wild Fennel in odour. Both this and the 

 oil of A. Berellieri are said to be used in the manufacture of 

 " Algerian Absinthe." 



As regards the "Absinthe" business, doubtless the common Worm- 

 wood, Artemisia Absinthium is a very important ingredient. 

 The plant is found wild in some parts of great Britain, and is here 

 cultivated to a small extent. The main centres of cultivation are 

 the United States, Eussia, Algeria, Corsica, and Spain. Preference 

 is given to the Spanish and Algerian oils. 



In America the acreage under cultivation of this plant has been 

 considerably reduced. The yield of oil for 1893 is estimated as 

 follows (at the rate of 30 lbs. per acre): — 



* Tractatus de Achilleis et Tanaceto, t. i., f. 2. 

 + Schimniel, Bericht., April, 1893. 



