CONTENTS 



PAGE 

 CHAPTER VII. PHYSICAL AND CHEMICAL CHANGES .......... 51 



Physical change; Chemical change. 



CHAPTER VIII. CHEMICAL PHENOMENA ................... 53 



Physical and chemical properties; Classification of matter; 

 Mechanical mixtures; Chemical compounds; Elements; 

 Number of elements ; Chemical synthesis ; Chemical analy- ; 

 sis; Chemical affinity. 



CHAPTER IX. CARBON .................................... 60 



Introduction; Charcoal; Uses of charcoal; Lampblack; 

 Coal ; Graphite ; Diamond ; Carbon dioxide C0 2 ; Prepara- 

 tion and test for carbon dioxide; Balance of carbon dioxide 

 maintained; Commercial uses of carbon dioxide. 



CHAPTER X. PHOSPHORUS ................................ 72 



Introduction; Preparation; Properties; Uses of phos- 

 phorus; Friction match; Safety match; Dangers of friction 

 match. 



CHAPTER XI. SULPHUR .... ............. ................. 77 



Occurrence; Preparation; Physical properties; Chemical 

 properties; Uses. 



CHAPTER XII. IRON ..................................... 84 



Introduction; Occurrence; Preparation from ore; Three 

 forms of iron. 



CHAPTER XIII. OXYGEN ................................. 00 



4"-*~ Introduction; Preparation; Properties; Oxidation; Uses; 

 Source. 



CHAPTER XIV. HYDROGEN ................... ............ 97 



L Occurrence; Preparation; Properties; Uses. 



CHAPTER XV. NITROGEN ..................... ............ 101 



Occurrence; Preparation; Properties; Uses. 

 CHAPTER XVI. ACIDS, BASES, AND NEUTRAL SUBSTANCES . . . 105 



Introduction; Acids; Characteristics of acids; Bases; 



Characteristics of bases; Neutralization; Salts. 

 CHAPTER XVII. WATER .................................. 110 



Introduction; Composition; Properties and uses; Hard and 



soft water; Plant and animal life dependent upon water; 



Dangers in water. 



