T~P 

 Contents. 



53 



Page 



Introductory remarks 5 



Report on essential oils, commercial and scientific 8 



Novelties 68 



The new American Pharmacopoeia 69 



The new Austrian Pharmacopoeia JJ 



The new Spanish Pharmacopoeia . 81 



Additional notes on aromatic chemicals 86 



Notes on recent scientific work concerning terpenes and terpene derivatives 97 



List of abbreviations, 

 d = specific gravity. 

 d^ 0O = specific gravity at 20 . 



20° 



d —5- = 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^ mn = index of refraction at 1 ; . 



n = normal. 



— I — ] = semi -normal or deci- normal (titrated solutions). 



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



Temperatures are uniformly stated in centigrade degrees (°). 



