42 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 58 



BOLIVIA (Continued) 

 *167. . Tin in Bolivia. 



Min. Ind. for 1902, Vol. 11, 1003, New York and London, pp. 588-590. 

 General description of tin deposits of Bolivia, methods of working, grade of ore, 

 production, etc. 



168. . Tin production in Bolivia. 



Eng. Mg. Journ., Vol. 77, 1904, New York, p. 244. 



Production of tin from mines in the neighborhood of Oruro. Description of the 

 individual mines. 



169. . Bolivian tin mines. 



Mg. Journ. Railw. Comm. Gaz., Vol. 79, 1906, London, p. 361, 450 words. 

 Reprint: Eng. Mg. Journ., Vol. 81, 1906, New York, p. 810. 



A letter dated Oruro, Bolivia, Jan. 26, 1906, giving a short general description 

 of the Bolivian tin mining industry. 



170. NEWLAND, D. H. Production of Bolivian mines for 1903. 



Min. Ind., Vol. 12, 1904, New York and London, pp. 329-330. 

 Mines in vicinity of Oruro briefly treated. 



171. OCHSENIUS, C. Die Silber-Zinnerz-Lagerstatten Bolivias. 



Zeitschr. deutsch. geol. Ges., Vol. 49, 1897, Berlin, pp. 693-695. 



17 la. OLAECHEA, T. El estano en Bolivia. 



Bol. Min. Indust. Constr., No. 7, ano, 18, 1902, Lima, pp. 51-53 and No. 8, pp. 59-62. 



" From an interesting article by Frochot, printed in " Annales des Mines," we 

 extract the points which may be the most directly useful to national [i. e. Peruvian] 

 mining; although the metal referred to has only been known to exist in the 

 department of Puno, it will not be strange if some day, owing to the mineral 

 wealth of the Peruvian soil, tin may be found as a result of new explorations, in 

 conditions where it can be conveniently worked." Then follow extracts from 

 Frochot's article. 



172. PASLEY, CHAS. S. The tin mines of Bolivia. 



Trans. Inst. Mg. Met., Vol. 7, 1898-1899, London, pp. 77-90, 95. 



Digest: Min. Ind. for 1898, Vol. 7, 1899, New York and London, pp. 707-718. 



Abstract: Coll. Guard., Vol. 77, 1899, London, p. 18. 



Fawns, Sydney. Tin deposits of the world, pp. 112 et al. 



Tin mines in East Cordilleras. Rocks Silurian graywacke, slate, shales, and 

 sandstone, cut by granite and later " porphyritic rocks." Trachyte in south. 

 Formerly worked at Huanuni by Spaniards down to 1000 feet carrying ore out on 

 their backs, two trips a day, 75 pounds per trip. Many rich veins from 1 foot 

 to 30 feet wide and carrying up to 50 per cent tin. Mines located at from 13,000 

 feet to 15,000 feet altitude. Freights high. Fuel scarce. Tourmaline found with 

 ores. Much antimony, pyrite, bismuth, and arsenic, with some silver, copper, and 

 gold. 



PEABCE, R. See No. 1630. 



172a. PENA, ALFONSO DE LA. La explotacion de minerales de estano en 

 Bolivia. 



Geol. Minas, Vol. 2, 1907-1908, Buenos Aires, pp. 336-339. 



173. PENBEBTHY, JOHN. Tin mining in Bolivia. 



Eng. Mg. Journ., Vol. 82, 1906, New York, p. 458. 



Deposits of Bolivia are both lode and alluvial. Principal centers of production 

 are Chorolque, Potosi, Uncia and Huanuni. The transportation to shipping points 



