80 BULLETIN 42, UNITED STATES NATIONAL MUSEUM. 



separated it is mouuted ou a specially coustructed truck and carried to 

 tbe shaft, where it is hoisted by special machinery. 



After the masses reach the surface, about 75 tons of them are placed 

 upon a pile of wood containing about 10 cords, and the wood iired. In 

 this way the rock that adheres to the copper is loosened, so that it can 

 be easily removed. After this cleaning they are shipped to the refin- 

 eries to be melted and converted into ingots. 



Besides the ordinary ore of the vein, which consists of the vein mat- 

 ter with disseminated copper, the third conglomerate, cut by No. 4 

 shaft, has been mined to a small extent. The extraction of copper from 

 this character of material will be fully described under the Osceola 



Mine and Mill. 



The collection from this mine was taken by Mr. E. L. Zukoski, E. m., 

 July, 1884, and shows a series of the mass copper, a series of the stamp 

 copper, a series of the conglomerate ores, and a series illustrating the 

 structure of the vein. 



To illustrate the mass copper nine specimens are shown : 



(1) Large mass, showing a surface that has beeu cut. (54871.) 



(2) Two strips, obtained in cutting up the hirge niasses. (54b69.) 



(3) Small mass, showing some rough crystals and some silicate of copper. (54870.) 



(4) Small mass, showing rough crystals with roughened surfaces and considerable 

 adhering vein matter. (54865.) 



(5) Small mass, a thick sheet showing some branching. (54864.) 



(6) Small mass, showing a few rough crystals and considerable adhering vein mat- 

 ter (54862.) 



(7) Small mass, a string, showing rough crystalswith blackened surfaces. (54868.) 



(8) Small mass, consisting of branching copper with a large amount of dissem- 

 inated vein matter, representing the masses that can be blasted with dynamite. 



(54866.) . ^ -u r. 



(9) Small mass, similar to the above, from which most of the vein matter has been 

 removed, showing the branching of the copper. (54867.) 



To represent the vein carrying disseminated free copper, six speci- 

 mens are shown : 



(1) Vein rock, mostly calcil e, carrying a large amount of free copper. (54849.) 



(2) Vein rock, mostly calcite, carrying much free copper, and stained by salts of 



copper. (54860.) ,r.fl,7 x 



(3) Vein rock, a mixture of calcite audepidote, carrying much free copper. (.74847.) 



(4) Vein rock, a mixture of calcite and epidote, carrying only a little copper. 



(5) Vein rock, a mixture of calcite and epidote, stained by salts of copper. (54848. ) 



(6) Vein rock, mostly epidote, with some zeolites, carrying considerable free cop- 

 per. (54852.) 



The third conglomerate cut by the fourth shaft, differs somewhat 

 from the other conglomerates of the region, in that it contains a large 

 amount of epidote rock pebbles in the ordinary ferruginous quartz por- 

 phyry conglomerate, the epidote carrying most of the copper. This ore 

 is taken out of the mine through an incline shaft running oft" from No. 

 4 shaft at the twentieth level. The incline has been run about 600 feet, 



