Contents. 



Page 



Introductory remarks 5 



Commercial notes and scientific information on essential oils 14 



New essential oils 131 



Pharmacopoeias . . . . . . 132 



Chemical preparations and drugs 134 



Notes on recent research work concerning terpenes and terpene derivatives 143 



List of abbreviations, 

 d = specific gravity. 



d2oo = specific gravity at 20 , compared with water at 15 . 

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

 «j)2oo = optical rotation at 20 , in a 100 mm. tube. 

 [a]j) = specific rotation. 

 n D20 o == index of refraction at 20°. 

 Sol. p. = solidifying point. 

 M. p. == melting point. 

 B. p. = boiling point, 

 n = normal. 

 Acid no. = acid number; ester no. = ester number; sap. no. = saponification 



number, 

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



Temperatures are uniformly given in degrees Centigrade. 

 The strength of alcohol, if not otherwise indicated, is given in per cent, by volume. 



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