CONTENTS. XV 



LECTURE XIII. 



PAGE 



Ideas regarding the Types Elucidation of the Nature of the 

 Radicals by the Valency of the Elements Quadrivalence of 

 Carbon Specific Volume Constitutional Formulae Separa- 

 tion of the Ideas of Atomicity and Basicity Isomerism amongst 

 Alcohols and Acids Physical Isomerism Unsaturated Sub- 

 stances - - 249 



LECTURE XIV. 



Theory of the Aromatic Compounds Determination of Position of 

 Substituted Atoms or Groups Quinones Artificial Dyes 

 Ring Compounds Constitution of the Alkaloids Syntheses 

 Condensation Processes - 272 



LECTURE XV. 



The Fundamental Conceptions of Chemistry Phenomena of Dis- 

 sociation Abnormal Vapour Densities Constant or Variable 

 Valency The Doctrine of Valency in Inorganic Chemistry 

 The Periodic Law Later Development of the Doctrine of 

 Affinity Spectrum Analysis Synthesis of Minerals Con- 

 tinuity of Matter in the Liquid and Gaseous States Liquefac- 

 tion of the so-called Permanent Gases Thermo-Chemistry 

 Electro-Chemistry Photo-Chemistry Molecular Physics 

 Morphotropy - - - 297 



LECTURE XVI. 



The Doctrine of Phases Van der Waals's Equation Theory of 

 Solution Electrolytic Dissociation Electro-Chemistry At- 

 tainment of High Temperatures Low Temperatures The New 

 Elements in the Atmosphere The Chemistry of Nitrogen 

 Transition Temperature Stereo - Chemistry Racemism 

 Syntheses in the Sugar and Uric Acid Groups lodoso-Com- 

 pounds Terpenes and Perfumes New Nomenclature - - 333 



INDEX OF AUTHORS' NAMES - 357 



INDEX OF SUBJECTS ... , 363 



