CONTENTS. XI 



CHAPTER III. 



^ 

 Compounds of carbon. 



Page 



SECT. I. Carbon and hydrogen, light carburetted hy- 

 drogen, safety lamp. , . . 420 

 Coal gas. ..... 422 



Structure of flame. . . . .424 



Olefiant gas. . . . .426 



SECT. II. Carbon and sulphur, bisulphuret of carbon. . 427 



SECT III. Carbon and nitrogen, cyanogen, mellon . 428 



CHAPTER IV. 



/ 



Compounds of phosphorus ^ sulphuret, azoturet. 429 



CHAPTER V. 



Metallic elements, general observations . 431 



Arrangement of metallic elements . . 438 



ORDER I. 



Metallic bases of the alkalies. 



SECT I. Potassium ..... 439 



Potash or potassa . . . . 444 



Peroxide of potassium . . . 447 



Sulphurets of potassium . . . 447 



Chloride, iodide, &c. . . . 449 



Ferrocyanide, ferricyanide . . . 450 

 Cyanide . . . . .451 

 Sulphocyanide. . . . .452 

 Salts of potash : carbonate, bicarbonate, sul- 

 phates, nitrate, (gunpowder,) chlorate, hy- 



perchlorate, iodate . . . 452 



SECT. II. Sodium ..... 461 

 Compounds of sodium : soda, . sulphurets, 



chloride or common salt 462 



