Copper Queen Mine model. Wooden core of one section of the Copper Queen Mine model. 

 It was built up of boards tj'j of an inch thick, the exposed edge of each representing a five-foot contour 

 of the map 



plaster-worker, made piece molds and 

 plaster copies of the sections, one set of 

 which was sent out to the Company at 

 Bisbee for the use of the engineering and 

 geological departments of the mine. 



The construction of the head frames, 

 shaft houses, loading bins, dwelling 

 houses and other buildings within the 

 area represented was no small task, inas- 

 much as there were several hundred of 



them to be made. After experimenting 

 with wood, plaster and other materials, 

 we finally made the metal buildings, 

 which are corrugated iron in the field, 

 out of brass covered with thin sheet zinc 

 scored to scale to represent the corruga- 

 tions, while the dwelling houses and 

 other small structures were made of 

 cardboard. The head frames, loading 

 bins, railroad tracks, locomotives, cars 



One section of Copper Queen Mine model, showing the surface of clay modeled upon the wood- 

 en core. It is ready for making the mold from which to cast the final surface in plaster 

 250 



