Contents. 



Page 



Introduction 5 



Commercial notes and scientific information on essential oils ... 22 



Chemical Preparations and Drugs 116 



Notes on recent research work: — 



General 128 



Bibliography 128 



Analytical 131 



Physical 132 



Pharmaco-priysiological 133 



Phyto-physiological 138 



Chemical 143 



Hydrocarbons . 145 



Alcohols 151 



Aldehydes 154 



Ketones 155 



Phenols and Phenol Esters 162 



Acids . 163 



Nitrogenous Bodies 164 



List of abbreviations, 

 d = specific gravity. 

 d 20 o = specific gravity at 20° (in references from our laboratories uniformly 



compared with water at 15°). 

 d^ = specific gravity at 20°, compared with water at 4°. 

 a D2oo = optical rotation at 20°, in a 100 mm. tube. 

 Md = specific rotation. 

 n D 2oo = index of refraction at 20°. 

 Sol. p. = solidifying point. 

 M. p. = melting point. 

 B. p. = boiling point, 

 n = normal. 



Acid v. = acid value; ester v. = ester, value; sap. v. = saponification value. ^ 

 g. = gram; cc. cubic centimetef; trnjm. == millimeter. 



Temperatures are uniformly given in degrees Centigrade. 

 The strength of alcohol, if not otherwise indicated, is given in per- 

 cent by volume. 



