430 



REPORT OF NATIONAL MUSEUM, 1899. 



Important 



natural 

 bitumens 



Table of occurrence of important natural JAtumen.^ 



Natural gas Ohio, Pennsylvania, California, etc., in the 



United States; Russia, France, etc. 



Natural naphtha Found in petroleum districts (of little value, 



superseded by artificial naphtha from crude 

 petroleum). 



Petroleum Pennsylvania, Ohio, Wyoming, California, 



etc., in United States; Russia, etc. (consult 

 books on petroleum ) . 

 Maltha California, Wyoming, Alaljama, Utah, Colo- 

 rado, Kentucky, New ]\Iexict), Ohio, Texas, 

 Indian Territory, etc.; Russia, France, 

 Germany, etc. 



North America Utah, California, Texas, 



etc. 

 Central America. . .Cuba, Mexico, etc. 



South America Trinidad, Venezuela, 



Peru, Colombia, etc. 



Europe Caucasia, Syran-on-the 



Volga, Germany, 



Asphaltum . 



Asphaltum 



almost 



pure. 



Asphaltic 

 compounds. 



France, Italy, Austria, 

 etc. 



Asia Hit on the Euphrates, 



Asia Minor, Palestine, 

 etc. 



Africa Oran in Egypt; probably 



other places. 



North America West Virginia, Kentucky, 



Texas, Wyoming, Utah, 

 Colorado, California, 

 Indian Territory, Mon- 

 tana, New Mexico. 



Central America. . .Mexico, Cuba, etc. 



South America Trinidad (largest supply, 



most used), Venezuela, 

 Peru, Colombia, etc. 



Europe Germany, Switzerland, 



France, Italy, Sicily, 

 Russia, Austria, Spain, 

 etc. 



Asia Asia Minor, Palestine, 



Bagdad, and probably 

 in China. 



Africa Egypt, and probably else- 

 where in Africa. 



Origin. — Of the many views, mainl}" theoretical, that have been put 

 forward to account for the origin of bituminous compounds, but two 

 need be noted in detail here. Interested readers are referred to the 

 bibliography given on page 460, and particularly to the works of 

 Peckham, Orton, and Redwood. Prof. Edward Orton, after an 



ij. W. Howard, as quoted by S. P. Sadtler, Journal of the Franklin Institute, 

 CXL, 1895, p. 200. 



