COPPER QUEEN MINE MODEL 



251 



and the like, are made of brass. The 

 cardboard houses were made by H. 

 Bierce; the metal work was done by 

 Frank O. Crieh. Cutting the contours 

 and building the wooden portion of the 

 model was done by Mr. Briesemeister 

 aided by Andrew Latzko and Prentice 

 B. Hill. 



When the model was originally pro- 

 jected, the plan was to represent only 

 the surface with a painted background 

 showing the surrounding mountains, but 

 there became evident as soon as work was 

 actively begun, the desirability of repre- 

 senting the underground workings of the 

 mine too, as fully as might be practicable. 

 It was decided furthermore, to build a 

 working model of a single stope on a scale 

 of six feet to the inch to represent details 

 that could not be indicated on the big 

 model. 



The representation of the underground 

 portion on the large model was a matter 

 of serious difficulty and led to the making 

 of several experiments. Finally it was 

 decided to excavate the under portion 

 of the model and to put into the hollows 

 thus formed, reproductions of the stopes 

 in solid wood cut according to the de- 

 tailed plans of the levels as furnished 

 by the engineers of the Company. 

 Tunnels, raises, winzes and shafts were 

 likewise constructed to scale according 

 to these plans and inserted in their 

 proper places, the result being a very 

 satisfactory representation of the stoped- 

 out ore bodies lying between the Czar 

 and the Lowell shafts, which are a mile 

 apart. No effort whatever has been 

 made to represent or even to indicate 

 the position of ore bodies which have not 

 been exploited. In sawing out and 

 building up these stope models, Mr. 

 Hill's practical knowledge gained through 

 several years' work underground as a 

 miner in the Southwest has been of 

 great value. The sides of the model 



have been used to give the geological 

 sections along several vertical planes 

 from 4100 feet above the sea up to 5900 

 feet on the Queen Hill, according to data 

 furnished by Arthur Notman and Max 

 Roesler, the geologists of the company. 



The large-scale stope model is based 

 upon data derived mostly from the 

 Gardner Mine, the distance from surface 

 to stope and from stope to main shaft 

 being lessened and the position of the 

 waste dump and loading bin with refer- 

 ence to the head frame being changed to 

 meet the requirements of our limited 

 space, but the square sets, man ways, ore 

 sheets, tunnels, shaft and machinery 

 have been built to scale from the plans 

 of the actual work and photographs. 

 The engine, however, is driven by an 

 electric motor with automatic reverse, 

 cunningly devised by Mr. Crich, con- 

 cealed underneath the shaft house. 



All the work was done in the Museum 

 under my immediate direction, with 

 assistance and advice in supervision from 

 Dr. James Douglas and the engineers 

 and geologists of the company during the 

 progress of the work. Furthermore we 

 utilized to the full the results of Freder- 

 ick L. Ransome's exhaustive study of 

 the region as published in the Bisbee 

 Folio (No. 112) and Professional Paper 

 No. 21, issued by the United States 

 Geological Survey. The model repre- 

 sents the region as it was in August and 

 September, 1910, it being impracticable 

 to keep pace in the model with the 

 changes constantly being made at an 

 active mine. 



The present property of the Copper 

 Queen Consolidated Mining Company 

 consists of 194 claims, covering about 

 21,350 acres of land. The rocks in which 

 the ores of copper occur at Bisbee are 

 Palaeozoic limestones and sandstones, 

 which have been much disturbed and 

 faulted and have been penetrated in 



