622 MANUAL OF NATURAL HISTORY. 



7. FAMILY. lodiniides. Mineral substances con- 

 taining mostly compounds of Iodine. Occur 

 combined with, metals as " Iodides/' in some 

 springs, but especially in the sea. Symb. I. 



IX. ORDER. RHETINEXIDES. 



Resins and other organic compounds. 



1. FAMILY Asphaltides. Mineral substances prin- 



cipally composed of bituminous compounds, 

 contain Carbon and Hydrogen. Occur as 

 Bitumen, Naptha, Petroleum, Asphalte, 

 Mineral Oil, &c., issuing from rocks in coal 

 formations, also in lakes, and on the shores 

 of the Dead Sea. 



2. FAMILY. Electrides. Mineral substances prin- 



cipally composed of resinous compounds, con- 

 tain Carbon, Hydrogen, and Oxygen. Occur 

 as Amber, Retinite, Fossil-copal, Mountain- 

 tallow, Mellite, &c. 



