NEW PHILIPPINE ESSENTIAL OILS. 351 



GENERAL. 



An oil of exceptionally fine fragrance and which may prove to be a 

 new oil from some species of Andropogon, has been examined recently 

 in the chemical laboratory of the Bureau of Science. Unfortunately, 

 botanical material at present is not available. 



The constants of this oil were as follows: Sp. Gr. g!, 0.8777; A^ 



inactive N §2! 1.4868; aldehydes, largely citral 72 per cent; geraniol 12 



per cent. The oil is optically inactive. 



The geraniol was estimated by the customary calcium chloride method, 

 and the semicarbazone of the aldehyde, after three recrystallizations from 

 dilute alcohol, melted at 155° to 160°. 



The perfumes sold in the local market under the name of champaca 

 do not duplicate the odor of the flower at all. This is also true of the 

 frangipani which commonly is supposed to be derived from the cemetery 

 flower or Plumeria acutifolia Poir. 



SUMIVIARY. 



(1) An oxidizing ferment is present in the flowers of Miclielia cham- 

 paca L. and Miclielia longifolia Bl. 



(2) The constants of the oils from white and yellow champaca flowers 

 have been determined and their properties described. The differences 

 between the two oils are clearly drawn. 



(3) Th oil from white champaca blossoms contains linalool, methyl 

 eugenol, methyl-ethyl acetic acid, probably in the form of the methyl 

 or ethyl ester, acetic acid probably as linalyl acetate, and a phenolic 

 substance possessing an odor closely resembling thymol. 



(4) In addition to isoreugenol, the essential oil of yellow champaca 

 flowers contains benzoic acid, benzyl alcohol, benzaldehyde, cineol, and 

 p-cresol methyl ether. 



(5) The essential oil of Clausena anisum-olens (Blanco) Merr. has 

 been prepared. The yield is about 1.20 per cent. It contains methyl 

 chavicol to the extent of about 93 per cent. 



(6) Orange-peel oil, from the common Philippine varieties of orange 

 has been made and its properties determined. 



(7) The oils distilled from the leaves of Citrus decumana. Citrus 

 histrix, and Toddalia aculeata are described. 



