CONTENTS XI 



group of elements ; Chlorids ; Problems ; Experiments and ques- 

 tions. Pages 80-85. 



CHAPTER XII 



Nitric Acid and Nitrogen Compounds. Occurrence ; Preparation ; 

 Properties ; Importance ; Ammonia ; Occurrence ; Preparation ; 

 Properties ; Uses ; Oxids of nitrogen ; Anhydrids ; Law of multiple 

 proportion ; Importance of the nitrogen compounds ; Problems ; 

 Experiments and questions. Pages 86-92. 



CHAPTER XIII 



Phosphorus and Its Compounds. Occurrence ; Preparation ; 

 Properties ; Oxids ; Phosphoric acid and phosphates ; Compounds 

 of phosphorus; Importance of phosphorus and its compounds; 

 Problems ; Experiments and questions. Pages 93-96. 



CHAPTER XIV 



Sulfur and Its Compounds. Occurrence ; Preparation ; Proper- 

 ties ; Uses ; Sulfur dioxid ; Sulfuric acid ; Properties of H 2 SO 4 ; 

 Sulfates ; Sulfids ; Problems ; Experiments and questions. Pages 

 97-102. 



CHAPTER XV 



Silicon and Its Compounds. Occurrence ; Preparation and proper- 

 ties ; Silicic acid ; Dialysis ; Silicates ; Importance of compounds of 

 silicon ; Problems ; Experiments and questions. Pages 103-106. 



CHAPTER XVI 



Oxids of Carbon, Carbonates, and Carbon Compounds. Carbon 

 dioxid ; Carbon monoxid ; Marsh gas ; Hydrocarbons ; Petroleum ; 

 Use of gasoline ; Illuminating gas ; Mineral oils ; Oil of turpentine ; 

 Creosote ; Benzene or benzol ; Aliphatic and aromatic series of com- 

 pounds ; Carbon disulfid ; Cyanids ; Carbids ; Fuels ; Caloric value 

 of fuels ; Foods ; Production of organic compounds in plants ; De- 

 cay of organic compounds; Experiments. Pages 107-119. 



CHAPTER XVII 

 Writing Equations. Importance ; Common errors in writing 



