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5;',~ <br />TI TL E. <br />The title is vested in the Rosa Mining and Milling Company, <br />incorporated under the lava of the State of Colorado. Cap- <br />ital stock 2,500,000 shares par value X1.00. Prinefpal <br />office located at Pittsburg, PA. Branch office at Silver- <br />ton, Colorado. Officers J. E. Mitchell, President, Pitts- <br />burg, Frank L. Ross, Secretary, Silverton, Colo. and <br />Robert i. Bryce, manager, Silverton, Coio. <br />HI STORY. <br />Abandoned SIi 1907 or 1908, reopened June 15, 191?,. <br />T OP O.GRAPHY. <br />The surface of the mountwin is very rough with consider- <br />e}~,e timber at an altitude of 10,500 Peet. The water <br />supple is Prom a spring. A trail connects mine with rail- <br />road. <br />G E O L O G Y. <br />A good geological survey has been :Wade oY this district. <br />The character of the country rock la as in U 3 G S folio <br />120. <br />- O R E S A N D O R E B O D I E S. <br />The character of ore bodies ie quartz veins. There are <br />7.velns.Tha strike of these veins vary greatly, dip d5° <br />West. The wiflth and length vary. The character of vein <br />filling is quartz with iron pprites showing some tungsten. <br />The character of enclosing rocks is andesite- Picayune. <br />Some smelting ore and some concentrating ores with a <br />little milling. The metals ere goad, sliver end tungsten. <br />The gangue quartz. <br />S U R F A C E P L ANT. <br />None. Surface transportation la done by pack train. and <br />rail. <br />E 7C P L O S I V E S. <br />40'~o Heroulee Dytpttite, slow burning inauloid fuse and wooden <br />teaming b era are used. Explosives in exoees of one daga <br />supply are stored itf an aband oned tunnel about 1000 feet <br />from tunnel. About 1000 pounds are stored therein. A hot <br />-2- <br />