Vi CONTENTS. 



PAGE 



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 

 specific heat Determination of molecular weights Raoult's 

 law 48-53 



8. Decomposition of compounds. Groups of compounds. 



Decomposition by heat, light, and electricity Mutual action 

 of substances upon each other The nascent state Analysis 

 and synthesis Acid, basic, and neutral substances Salts 

 Eesidues, radicals 53-60 



9. General remarks regarding elements. 



Eelative importance of different elements Classification of 

 elements Metals and non-metals Natural groups of elements 

 Mendel ejefPs periodic law Physical properties of elements 

 Allotropic modifications Relationship between elements and 

 the compounds formed by their union Nomenclature Writ- 

 ing chemical equations How to study chemistry . . . 60-70 



III. 



NON-METALS AND THEIR COMBINATIONS. 



Symbols, atomic weights, and derivation of names Occur- 

 rence in nature Time of discovery Valence . . . 71-72 



10. Oxygen. 



History Occurrence in nature Preparation Physical and 

 chemical properties Combustion Ozone .... 73-77 



11. Hydrogen. 



History Occurrence in nature Preparation Properties 

 Water Mineral waters Drinking-water Distilled water 

 Hydrogen dioxide 78-84 



12. Nitrogen. 



Occurrence in nature Preparation Properties Atmo- 

 spheric air Ammonia Compounds of nitrogen and oxygen 

 Nitrogen monoxide Nitric acid ; tests for it . . . . 84-91 



13. Carbon. 



Occurrence in nature Properties Diamond Graphite 

 Tests for carbon Carbon dioxide Carbonic acid Tests for 

 carbonic acid Carbon monoxide Compounds of carbon and 

 hydrogen Flame Silicon Silicic acid Boron, boric acid ; 

 tests for it 92-99 



14. Sulphur. 



Occurrence in nature Properties Crude, sublimed,washed, 

 and precipitated sulphur Sulphur dioxide Sulphurous acid ; 

 tests for it Sulphur trioxide Sulphuric acid ; its manufac- 

 ture and properties Tests for sulphates Sulpho-acids 

 Pyrosulphuric acid Thiosulphuric acid Hydrogen sulphide ; 

 tests for it Carbon disulphide Selenium Tellurium . . 100-108 



