TT 3 



°^ 



Contents. d ^± 



Page 



Introductory remarks 5 



Report on essential oils, commercial and scientific 7 



Russian Pharmacopoeia 93 



Novelties 96 



Notes on recent scientific work concerning terpenes and terpene derivatives 97 



Additional notes on aromatic chemicals 133 



List of abbreviations, 

 d = specific gravity at 15 , unless otherwise stated. 

 d 2QO = specific gravity at 2,0°. 



20° 



d — q- = specific gravity at 20 , compared with water at 4 . 



4 

 a = optical rotation at 15 , in a 100 mm. tube. 



[a] D = specific rotation, 

 n = normal. 



2\loJ 



: semi -normal or deci- normal (titrated solutions), 

 gm. = gram; cc. = cubic centimeter; mm. = millimeter. 



Temperatures are uniformly stated in centigrade degrees (°). 



