GENERAL AJS'D ECONOMIC GEOLOGY 271 



worthy of special attention. The waters of Caxambii and Limbary are 

 well and favorably known in the Brazilian market. 



Besides those noted by Gorceix in the Tertiary basins, bituminous 

 e.hales are said to occur in the Serra de Sete Lagoas.* 



A valuable book in connection with the history of mining in the State 

 of Minas is the Historia do Districto Diamantino, by Dr. Joaquim Fe- 

 licio dos Santos, published at Eio de Janeiro in 1868. Those who visit 

 the region will be interested to read Mawe's Travels, first published at 

 London in 1812, and at Philadelphia and Boston in 1816. Mawe was an 

 English mineralogist and was the first foreigner permitted to visit the 

 diamond regions of Brazil. 



The climate of Minas Geraes is remarkably fine and healthful; the 

 region is high and well watered and in many places well timbered. 



Geologic Maps of Minas Geraes 



Pissis, 1842. — In 1842 the French Academy of Science published A. 

 Pissis' "Memoire sur la position geologique des terraines de la partie 

 australe du BresiV^ etcetera, and that paper was accompanied by what is 

 called a geologic sketch-map (Esquisse geognostique) of the gold region 

 of Minas Geraes. It embraces an area of something more than 9,400 

 square kilometers, from 10 kilometers south of Ouro Branco to Cocaes 

 on the north. The map is on a scale of 1 to 250,000 and four geologic 

 divisions are shown, namely: gneiss, talc, quartzite, itabirite, and lime- 

 stone. 



That same paper contains another geological map that embraces the 

 region from Bahia on the north to Piracicaba, Sao Paulo, on the south, 

 and all of the province of Minas Geraes east of Eio Sao Francisco. The 

 scale of this map is 1 to 2,500,000 and the following geologic divisions 

 are shown : four for the "terrain primitif ^' ; two for the "periode phylla- 

 dienne" ; one for diorite ; two for the Tertiary. 



Harder and Chamberlin, 1915. — The small map published by Harder 

 and Chamberlin in connection with their article on the geology of central 

 Minas Geraes, in the Journal of Geology, May- June, July- August, vol- 

 ume XXIII, page 341, etcetera, shows the general geology of the region 

 extending from Queluz to Diamantina and about one degree wide. The 

 scale is about 1 to 22,000,000 and seven geologic divisions are shown. 



Bihliography of the Geology of Minas Geraes 



A, DE Bovet: a Industria mineral na Provincia de Minas Geraes. la parte, 

 ouro e ferro. Annaes da Escola de Minas de Ouro Preto, 1883, No. 2, 



E. Liais : Climats, Geologie, etc., du Bresil. Paris, 1872, p. 130. 



