Roger Weller, geology instructor
wellerr@cochise.edu copyright 2018-R.Weller
Stoping in the Calumet
and Arizona Mines, Bisbee, Arizona
by Philip D. Wilson, 1916
Trans. A.I.M.E.
19 pages (pages 118 to 136)
Click Here to Start
This historic document describes the
mining practices used
in creating head frames
for stoping in Bisbee in 1916.