Contents. 
Page 
Introductory remarks 5 
Report on essential oils, commercial and scientific 8 
Supplement to the Dutch Pharmacopoeia 68 
Belgian Pharmacopoeia 71 
Novelties 76 
Notes on recent scientific work concerning terpenes and terpene derivatives . 78 
Additional notes on aromatic chemicals loi 
On the pharmaco-therapeutics of the Aethereo-oleosa, by Prof. Dr. R. Kobert 107 
List of abbreviations. 
d = specific gravity at 15°, unless otherwise stated, 
dg^o = specific gravity at 20°. 
20° 
d = specific gravity at 20°, compared with water at 4°. 
4 
ttj^^^Q = optical rotation, at 15°, in a 100 mm tube. 
[ajo = specific rotation. 
n„ ^ = index of refraction at i 
D150 J 
n = normal. 
^ = semi - normal or deci- normal (titrated solutions), 
g = gramme ; cc = cubic centimeter ; mm = millimeter. 
Temperatures are uniformly stated in centigrade degrees (°). 
