Miners underground at a Clifton-Morenci area copper mine Photo Description Larry Hoffman believes these are Temple-Ingersoll "Electric-air" drills that were used in the 1910s. s Photo Details Location: Morenci , Arizona (gallery) Year: ca. 1910s Source: User contributed
Photo Description Larry Hoffman believes these are Temple-Ingersoll "Electric-air" drills that were used in the 1910s. s
