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Show , purr OS AND LLAMAS REPLACED BY TRUCKS fXts-. r "v".- 1 '.' ,:- :. .,---; :-.:. U , 4 . ' i ' ' I , li ' " I 1 " F ' - v ' ' ' 'Jl - ' li !; I I "'", ' ' "I I 4 ' '' b '...:..'.:;',. .: , v., ." ' --,. . -. . ,z ''.: , - . y - ' I. ':-.: i .'.': '- ' 4 . : ' '" . .'...- - ' - - - " : f,'-' ' . v. :- l- ', -y . .'.'. " , i Popular Type of Truck Loaded With Concrete Blocks. Transportation of heavy supplies up steep mountain trails formeriy traversed trav-ersed only by burros and llamas, to Bolivian, mines located IL'.OiHI !o lo.'WI fei t abov e sea level in Amies range, lias been solved by the use of lighl aulomobile trucks. Developed by Incas. Centuries ago the Incas first developed devel-oped these mines located In the most accessible inland ranges. The Span-i Span-i b-b ci.iti'.iisiadoi't. envious of the I Indians' wealth, made short work of reducing the native population to it ceiidllion of slavery and supervising the production of gold. In later years silver and tin have been the most 1 profit able metals produced In Bolivia, with operations seriously handicapped by the inaccessibility of the milling sites. Until a year ago Iiihtos anil llamas, carrying u maximum load of I'm i ' pounds each and tnivellin; only 20 miles daily were relied upon to transport trans-port supplies to the sky-line operating centers mid to carry down to seaboard sea-board and railroads the refined metals, enormously heavy even in small quantities. quan-tities. Improv emeiils in mining practice prac-tice were impossible until better distributing dis-tributing methods were available. Charges Reduced. .Notwithstanding roads which wet only rough trails covered with rocks and the fact that an automobile motor ordinarily loses .'; ) to :;5 per cent of Its power when operating In the rarefied at inosphere of high altitudes, trucks have practically siiper.-e.led tlie pack animals. (hie light truck carrying L',i:i0 poi'inls and covering 120 miles dally, does tlie work of I'j'i burros or llamas and cuts li atispo.-tal Ion charge-i exactly in half. |