SULPHURET OF CARBON, 



563 



Oak, 

 Ash, 

 Birch, 

 Norway Pine, 



Mahogany, 

 Sycamore, 



Holly, 



Scotch Pine, 



Beech, 



Elui, 



Walnut, 



American Maple, 



Do. Black Beech, 

 Laburnum, 



Lignum Vitae, 

 Sallow, 



Volatile 



Matter. 



76.895 



81.260 



80.717 



80.441 



73.528 

 79.20 



Charcoal. Ashes. 



Charcoal by 



22.682 

 17.972 

 17.491 

 19.204 



25.492 

 19.734 



0.423 

 0.768 

 1.792 

 0.355 



0.980 

 1.068 



78.92 19.913 1.162 



Proust. 

 20. 

 17. 



20. 



Black Ash, 

 25. 



Willow. 



17. 



Heart of Oal 

 19. 



Guaiacum. 

 24. 



Kumford. 

 43.00 



44,18 



76.304 23.280 0.416 



43.27 



42.23 



Poplar. 

 4357 



Lime, 

 43.59 



the 



s 



Chesnut, 



(b.) Charcoal, in the form of lampblack and plumbago, is among t 

 most enduring of paints, and forms a firm body with oil. Plumbago 

 used for lubricating machinery, for making crucibles, for protecting 

 iron from rust, and to give it lustre. Charcoal with oil forms print- 

 er's ink ; with sulphur and nitre, gunpowder ; with iron, by cementa- 

 tion, steel ; it is used to exclude or to confine heat ; it is a very ex- 

 cellent fuel, and it is employed with advantage, after being thorough- 

 ly ignited, to surround that part of lightning rods which enters the 

 ground . Thenard. 



(c.) Charcoal is of great utility in reducing the metals, both in raising 

 the necessary heat and in detaching oxygen from the oxides. Carbon, 

 in the form of diamond is the most beautiful of ornaments, and the 

 best substance to cut glass, and to afford a cutting powder to polish the 

 hardest bodies, diamond itself not excepted. The water of the Seine, 

 rendered turbid by mud in the winter, is purified and made potable, by 

 passing through charcoal, placed between two layers of sand, and 

 these between two others of gravel and pebbles. Id. 



(d.) It is exceedingly abundant in nature ; it exists in all animal and 

 vegetable bodies ; in all the varieties of natural coal, and bitumens, 

 and petroleum and naptha ; in the carbonates of lime, and other min- 

 eral carbonates ; in carbonic acid, both free in the air, and dissolved 

 in water.; and in the carburetted hydrogen gases and carbonic oxide ; 

 and its chemical and natural history involves a vast number of inter- 

 esting and important facts. 



SULPHURET OF CARBON. 



1. PREPARATION. 



(a.) A porcelain tube, one inch and a half in diameter, coated with 

 fire lute, and partly filled with fragments of recently ignited charcoal^ 



