Fossils* 



III. Inflammables. Inflammables are 

 sulphur or bitumens. These substances 

 are both derived from the spoils of vege- 

 tables and animals. 



Sulphur, known also by the name of 

 brimstone, is a simple combustible sub- 

 stance, which nature frequently presents 

 in a pure state. It is found in the earth 

 in a loose powder, or solid ; and either 

 detached or in Veins. It is met with in 

 the greatest plenty in the neighbourhood 

 of volcanoes, and is deposited as a crust 

 on stones contiguous to them. It is al- 

 so met with in mineral waters, coal-mines, 

 ?c. and also in combinations with most 

 of the metals. 



The bitumens are naptha, petrol, min- 

 eral tar, asphaltum,jet, cannel-coal, min- 

 eral tallow, pit-coal, amber, &c. 



Naptha is a white or yellowish white 

 substance, fluid as water, feels greasy, 

 has a penetrating smell, and burns with a 

 light flame,leavmg scarcely any residuum. 



Petrol, or Petroleum, is a brown semi- 

 transparent substance ; being naptha, 

 thickened, and altered in colour and other 

 respects by the air. 



