XO. 2 BlBLIOGKAPilY OF TIN IIESS 39 



BOLIVIA (Continued) 



A translation was published in London in 1740, entitled: "A collection of scarce 



and valuable treatifcs upon metals, mines and minerals Being a translation 



from the Iramed AUvno Alonso Barba, director of the mines at Potosi in the 

 Spanish West Indies, and the observations of several ingenious persons of our own 

 country, fnuiulrd on nuuij' years experience." Tin, chap. 32, pp. 107-110. 



Beck, Riciiakd. See No. 1299. 



152. Benedict, Wm. de L. Tin in Bolivia. 



Min. Ind. for 1S92, Vol. 1, 1893, New York and London, pp. 450-451. 



Tin at Potosi is found in large quantities in silver bearing veins. At Chorolque, 

 bisnnith and tin are found close together in distinct veins. A few deposits of 

 alluvial or stream tin have been discovered, but onlj' one that is of any importance. 



152a. Berkey, Charles P. See Rumbold, William R. Origin of Bolivian tin 

 deposits. 



Descriptions of microscopic sections of Bolivian tin ores and rocks. 



153. Bradley, D. H., Jr. Mining in Bolivia. 



Mg. Mag., Vol. 11, No. 1, 1905, New York, pp. 41-48, 9 illus. 



As a tin producing country, Bolivia is second to Malay Peniii^iula. Witli 

 the exception of that from Potosi, bar tin, the product of Bolivia is .second in 

 quality to none. Deposits rich, output increasing. Tin will undoubtedly be found 

 in many other parts of Bolivia. Bolivian mines offer immense opiwrtunities for 

 investments paying 25 per cent promiLim within 3 or 4 j^ears. 



153a. Brown, Gilmour E. Present position of Bolivian tin mines. 



Mg. Journ. Railw. Comni. Gas;., Vol. 8-5, 1909, London, p. 399. 

 Extract: Mg. World, Vol. 36, 1909, Chicago, p. 829. 



A few notes on the cost of mining and smelting, and the names of a few of the 

 principal mines operating in Bolivia. 



154. Conway, Sir Martin. Climbing and exploration in the Bolivian Andes. 



New Vork, 1901, pp. 291-299. 



Tlie tin mines of lluaina Potesi are treated from a literary rather than geological 

 standpoint. Veins from 3 meters to 10 meters wide occur in " porphyry," slate 

 and trachyte. 



D'AciiiARDi, Antonio. See No. 1313. 

 Davies, D. C. See No. 1317. 



155. Emmons, S. P. Geological distribution of the useful minerals. 



Trans. Amer. Inst. Mg. Eng., Vol. 22, 1894, New York, p. 72. 



" In Bolivia where tin ore forms an important part of the mineral product, it 

 occurs in andesitic or trachytic rocks of Cretaceous or Tertiaiy age, is associated 

 with sulphides of silver, copper, lead, zinc and iron and without the usual 

 accompaniment of tourmaline, topaz, fluorspar or apatite." 



155a. Endteb, AufarsTO. The tin mines of Llallagua, near Oruro, Bolivia. 



Mg. Journ. Railw. Comm. Gaz., Vol. 86, 1909, London, pp. 52-53. 



Abstracted from " Compania Estaiiffera de Llallagua. Tercera Menioria del Direc- 

 torio y Balance Jeneral al 31 de Diciembrc de 1908." Santiago de Chile, 1909, 36 

 pages with five folding plates. 



Treats of the geology, vein structure and mining methods, also announces and 

 describes a newly found pocket of rich ore. 



