CONTENTS ' 193 



Page 



Mercury 327 



Molybdenum 327 



Non-metallic minerals 328 



Coal, lignite, and peat 328 



Petroleum and oil shales 328 



Asphalt 329 



Building stones 329 



Marble 329 



Limestone 329 



Gypsum 329 



Anhydrite 829 



Magnesite 329 



Kaolin, clay, fullers earth 329 



Glass sands 329 



Asbestos 330 



Talc 330 



Mica 330 



Salt 330 



Niter -. 330 



Graphite 831 



Bauxite 331 



Monazite 331 



Zirconia 332 



Phosphates 332 



Diamonds 332 



Carbonados, or black diamonds ,, 333 



Other precious stones 334 



The mining laws of Brazil 334 



General observations 334 



Bibliographic references to mining laws 335 



Works of travel in Brazil 335 



Climatic conditions 837 



FOEEWORD 



The accumulation of the data for a geologic map of Brazil was begun 

 by me in 1874, when I first went to that country, and has been kept up, 

 as opportunities offered, down to the present time. The gathering and 

 study of the material and the preparation of the map may therefore be 

 said to represent the work of a considerable portion of a lifetime. 



The data brought together on the map and in the accompanying text 

 are published by the Geological Society of America primarily as a con- 

 tribution to the world's knowledge of the geology of America; but, so 

 far as I am concerned, it is meant especially to be of service to the Bra- 

 zilian people, among whom I have spent many years, to whom I am 

 strongly attached, and in whose welfare I am deeply interested. 



