etable or in some cases perhaps animal also, at least in part. 

 Examples are shown here of hard asphalt from two localities 

 in Cuba, and from the celebrated ' ' pitch lake ' ' of the island of 

 Trinidad, in the West Indies. Great deposits of asphalt occur 

 likewise in Venezuela, which have given rise to much of the dis- 

 putes between American capitalists and the government of 

 that country. 



There are also some substances known as asphaltic coals, 

 which resemble coal in appearance but are quite different in 

 origin, occurring not in beds laid down by deposition, but as 

 the filling of veins or fissures in other rocks. This fact, with 

 other peculiarities both of occurrence and of composition, shows 

 them to be hardened and condensed forms of hydro-carbons 

 similar to asphalt. Such are the "Albert Coal," or Albertite, 

 of New Brunswick; the Grahamite of West Virginia; and a 

 similar substance from Mexico, all of which are shown. These 

 from their large amount of hydro-carbon content, are of espec- 

 ial value in gas-making. 



Related to the asphalts in composition, but different in some 

 respects, and especially in texture and physical properties, is 

 the curious substance known as mineral wax, or ozokerite (also 

 spelled ozocerite). It is a rare body, found at only a few local- 

 ities; but a series of typical specimens may be seen here. 



The Fossil Resins 



Still another class of carbon minerals may be noted — namely, 

 the fossilized resins. These differ in containing a much larger 

 proportion of oxygen than those before described, and are 

 known as oxygenated hydro-carbons. They are formed in 

 small quantities only and in close association with Hgnites and 

 some coals, and they represent the resinous matter present in 

 the original wood. All Carolinians are familiar with the abun- 



26 



