vi CONTENTS. 



PAGE 



proportions Combining weights of elements Atomic theory 

 Atomic weight Atoms and molecules Chemical symbols 

 Formulas of compounds Law of chemical combinations by 

 volume Law of equivalents Valence or quantivalence . . . 93-104 



7. Determination of atomic and molecular weights. 



Determination of atomic weights by chemical decomposition, 

 by means of specific weights of gases or vapors, by means of spe- 

 cific heat Determination of molecular weights Raoult's law 105-110 



8. Chemical equations. Types of chemical change. Reversible 



actions and chemical equilibrium. Mass action. 

 Acids, bases, neutralization, salts. Radical. Consti- 

 tutional formulas ..." 110-124 



9. General remarks regarding elements. 



Relative importance of different elements Classification of 

 elements Metals and non-metals Natural groups of elements 

 MendelejefF's periodic law Physical properties of elements 

 Allotropic modifications Relationship between elements 

 and the compounds formed by their union Nomenclature 

 How to study chemistry 124-133 



III. 

 NON-METALS AND THEIR COMBINATIONS. 



Symbols, atomic weights, and derivation of names Occur- 

 rence in nature Time of discovery Valence 135-136 



10. Oxygen. 



History Occurrence in nature Preparation Physical and 

 chemical properties Combustion Ozone Thermo-chemistry 137-144 



11. Hydrogen. Water. Hydrogen dioxide. 



History Occurrence in nature Preparation Properties 

 Nascent state Water Mineral waters Drinking-water Dis- 

 tilled water Analysis and synthesis Explanation of efflor- 

 escence and deliquescence Hydrogen dioxide 144-156 



12. Solution. 



General remarks Terms employed Heat of solution So- 

 lution of gases Henry's law Freezing-points, boiling-points, 

 and osmotic pressure of solutions Raoult's law Laws of os- 

 motic pressure 157-164 



13. Nitrogen. 



Occurrence in nature Preparation Properties Atmo- 

 spheric air Argon Helium Ammonia Hydrazine Hy- 

 droxylamine Triazoic acid Compounds of nitrogen and 

 oxygen Nitrogen monoxide Nitric acid ; tests for it ... 164-177 



14. Carbon. Silicon. Boron. 



Occurrence in nature Properties Diamond Graphite 

 Tests for carbon Carbon dioxide Carbonic acid Tests for 

 carbonic acid Carbon monoxide Carbonyl chloride Com- 

 pounds of carbon and hydrogen Flame Silicon Silicic acid 



