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Show DOWN AND UPCAST SHAFTS. ; jj HH When two shafts are sunk on a mine and con- ' j j j HffiH nected in the depths, not infrequently one be- Bl comes an upcast shaft and the other a downcast i , HSfl shaft. That is, the air goes down one shaft and ' ' I 1819 up the other. Sometimes when more work is ; j jjjflB done in the deep, this circulation becomes re- i fflKH versed, the shaft that was an upcast becomes a 1 Hffll downcast shaft, and the other the upcast. 1 1 1 ; , SBH Well, Salt Lake City has been an upcast shaft 1 1 , i V fHH for the trade of all the country to the southwest i p flX3j for many years. But the men of Los Angeles are j HH drifting and doing all they can to reverse the old U 8HI trade current to make of Los Angeles the shaft , ' ;J, gfl to draw the trade currents that way. Salt Lake i 8BH should have the trade of the new mining fields i ' ' ' ' nHH in southern Nevada and should keep the trade ' ! ,'' jfljfl of southern Utah. But a new competitor is in the : ' j HjH field and has some direct advantages over Salt Lake. It is on the sea shore, in a spot where the ISBI transportation companies cannot discriminate i j against it, and it will require shrewd and earnest i ' !i (HI work on the part of Salt Lake to stand off those i j , flH advantages, and keep Salt Lake from becoming j ' i ! fl a downcast shaft. ; ( , 9fl |