Contents. 
Page 
Introductory remarks 5 
Report on essential oils, commercial and scientific 8 
Novelties . 82 
Notes on recent scientific work concerning terpenes and terpene derivatives . 84 
Additional notes on aromatic chemicals 102 
List of abbreviations, 
d = specific gravity at 15°, unless otherwise stated. 
^20° ~ specific gravity at 20°. 
20° 
d — specific gravity at 20°, compared with water at 4°. 
4 
CCD 15°= optical rotation, at 15°, in a 100 mm tube. 
[a]D = specific rotation. 
nD 15° = index of refraction at 15°. 
n = normal. 
^^^j = semi -normal or deci- normal (titrated solutions), 
g = gramme ; cc = cubic centimeter ; mm = millimeter. 
Temperatures are uniformly stated in centigrade degrees (°). 
