NO. 2 BIBLIOGKArilY OF TIN — IIESS 37 



BOLIVIA (Continued) 

 139. . Bolivian tin and the supply of the United States. 



Eng'. Mg. Journ., Vol. 66, 1808, New York, p. 6.32. 



Editorial in which is discussed the dcvolopmcnt of the tin plate industry in 

 United States, and the increasing block tin importation. AVhy wc do not import more 

 raw material from Bolivia is also discussed. 



140. . L'etain en Bolivie. 



Illustration, Vol. 116, 10(X), P;,ris, p. 410. 



Review: Berg. Hutt. Zeit., Vol. Cn, 1901, Leipzig, p. 268. 



141. . Tin in Bolivia. 



Min. Ind. for 19O0, Vol. n, 1901, Now Vork and London, p. f.30. 



Tin is mined in the departments of Oruro, Potosi, La Paz and Cnchahamha, of 

 which Oruro is much the most important, containing within its borders 25 out 

 of a total of 37 mines of the whole country. 



141a. . Tin in Bolivia. 



Min. Ind. for 1901, Vol. 10, 1902, New York and London, p. 641. 

 Most import-ant tin mining district is that of Huanuni, where tin ore occurs in 

 numerous veins and lodes, traversing the granite country rock. 



142. . Tin in Bolivia. 



Eng. Mg. Journ., Vol. 73, 1902, New York, p. 218. 



Answer to correspondent asking about Bolivia tin deposits. Gives recent production 

 and some other data. 



143. . Tin in Bolivia. 



Mo. Bull. Int. Bur. Amer. Repuh., .Jan. -June, 1902, Washington, D. C, pp. 588-590. 



In the Huammi district in Bolivia on the mountain of Pozoconi, many of the 

 tin veins run into tin pyrites at from 100 to 200 feet in depth. " Solid tiastone of 

 variable width up to 2 feet." One vein at the Challa and Apacheta mines, 10 

 miles south of Huanuni is 25 to 30 feet wide, averaging 20 per cent tin. The 

 vein is composed of grains of SnOj in an argillaceous rock. 



Tlie Arecayo mine of the Oruro district, has lodes from 1 to 3 feet wide and 

 has considerable masses of solid ore, averaging more than 40 per cent tin. 



144. . A new tin mine, Bolivia. 



Mg. Journ., Railw. Comm. Gaz., Vol. 74, 1903, London, p. 525. 



Situated 57 miles south of Tupiza, anciently worked in a small way for silver. 

 In 1901 opened as tin mine. Striking in an easterly and westerly direction, lodes 

 cut decomposed clay, slate and shale. Principal lode over 800 feet in length, with 

 an average width of 2 feet. With the rudest dressing machinery, about 23 tons 

 of black tin of 55 per cent to 62 per cent is produced monthly. 



145. . Tin mining in Bolivia. 



Eng. Mg. Journ., Vol. 80, 1905, New York, p. 698. 



Brief summary of report of the British Foreign Office. Since rise in price of 

 tin, the famous silver mines of Oruro have depended for their prosperity more 

 on their tin output than silver production. Bolivia now one of the largest 

 producers of tin in the world. Total shipments in 1904 from Oruro district 

 amounted to equivalent of 80O0 tons of metallic tin, in 1903 the output was about 

 one-half as large. 



146. . Tin mining in Bolivia. 



Eng. Mg. Journ., Vol. 81, 1906, New York, p. 1137. 



Tin deposits of La Blanca, San Jos6 and Quinsachata are briefly described, giving 

 output, etc. 



