NO. 2 BIBLIOGRAPHY OF TIN HESS 41 



BOLIVIA (Continued) 

 GMEHLING, ANDREAS. See No. 1497. 



161. HARBISON, G. Tin in Bolivia. 



Diplomatic and Consular reports (Bolivia). Trade of Bolivia for the years 1904-1905, 

 No. 3600, Ann. ser. 1906, London, p. 4. 

 Mentions tin mining as principal industry. 



161a. LIGHT, JOHN. El estano boliviano y la iniciativa chilena. 



Geol. Minas, Vol. 1, 19C6-1907, Buenos Aires, pp. 392-397. 

 Taken from " La Lei," Santiago, Chile. 

 General article upon tin, particularly of Bolivia. 



Louis, HENRY. See No. 1340. 



162. MINCHIN, J. B. Tin mines in Bolivia. 



Eng. Mg. Journ., Vol. 51, 1891, New York, pp. 586-587. 



Good description of various tin mines of Bolivia, associated ores, manner of 

 working, difficulties of transportation. Most important deposits are situated among 

 the mountain ranges bordering the table-land to the east and northeast of Oruro 

 and Lake Poopo, and are scattered over some 500 square miles. General country rock 

 is shale, more or less highly inclined and contorted from eruptions of trachytic 

 porphyry; the tin veins occur in the latter. 



163. MINCHIN, J. B. Mineral resources of Bolivia. 



Iron, Vol. 37, No. 962, 1891, London, p. 536. 



164. . The mineral resources of Bolivia. (Tin mines.) 



Engineering, Vol. 51, 1891, London, p. 453. 



Tin-bearing country extends along eastern border of Bolivian table-land from 

 lake Titicaca to near the Argentine boundary. At Potosi and Oruro tin is asso- 

 ciated with ores of silver, in other places, found alone or mixed with iron oxide 

 and earthy matter. Country rock is shale, inclined and contorted from eruptions 

 of trachytic porphyry; the tin veins occur in the latter rock. Mode of occurrence 

 varies even in one group of mines. Country lacks adequate mining machinery. 



165. . Tin in Bolivia. 



Mo. Bull. Int. Bur. Amer. Repub., No. 55, 1892. Revised to July 1, 1893, 

 Washington, D. C., pp. 74-78. 



Short, general, . descriptive article, probably taken from his " Tin mines in 

 Bolivia," Eng. Mg. Journ., Vol. 51, 1891, New York, pp. 586-587. 



166. . Notes on tin mining in Bolivia. 



Eng. Mg. Journ., Vol. 75, 1903, New York, p. 31. 



Reprint with additions: Mo. Bull. Int. Bur. Amer. Repub., 1904, Washington, 

 D. C., pp. 107-116. 



Mines are briefly described. Tin ore occurs chiefly at La Paz on the north, 

 Oruro in the middle, Chorolque on the south and Potosi on the east. Huanuni 

 is richest tin district. Transportation by pack mules, llamas and wagons. ' The 

 best tin is said to come from Berenguela, 45 miles east of Oruro. Mines were 

 formerly worked for silver. Some of the tin ore is very hard to handle on account 

 of the large amount of antimony and other sulphides. Tin mining develops as 

 transportation becomes easier. 350 tons barilla (concentrates) estimated to give 

 210 tons of bar tin. 



Output of barilla for 1902: 1901: 



La Paz 9,536 met. quin 10,780 



Oruro 96,981 " " 100,206 



Chorolque 13,365 " " 39,175 



Potosi 56,201 " " 



Total 176,083 219,159 



