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76 Ball mills at the Magna mill. Each cylinder contains about sixty tons of steel balls, which roll as the cylinder turns, grinding the ore between the balls.Imageuum_map
77 Barrett Manufacturing Company1917-11-20Imagedha_scp
78 Barrett Manufacturing Company1917-11-20Imagedha_scp
79 Barrett Manufacturing Company1917-11-20Imagedha_scp
80 Barrett Manufacturing Company1917-11-20Imagedha_scp
81 Barrett Manufacturing Company1917-11-20Imagedha_scp
82 Barrett Manufacturing Company1917-11-20Imagedha_scp
83 Barrett Manufacturing Company1917-11-20Imagedha_scp
84 Barrett Manufacturing Company1917-11-20Imagedha_scp
85 Barrett Manufacturing Company1917-11-20Imagedha_scp
86 Barrett Manufacturing Company1917-11-20Imagedha_scp
87 Barrett Manufacturing Company1917-11-20Imagedha_scp
88 Barrett Manufacturing Company1917-11-20Imagedha_scp
89 Barrett Manufacturing Company1917-11-20Imagedha_scp
90 Barrett Manufacturing Company1917-11-20Imagedha_scp
91 Barrett Manufacturing Company1917-11-20Imagedha_scp
92 Barrett Manufacturing Company1917-11-20Imagedha_scp
93 Barrett Manufacturing Company1917-11-20Imagedha_scp
94 Barrett Manufacturing Company1917-11-20Imagedha_scp
95 Barrett Manufacturing Company1917-11-20Imagedha_scp
96 Barrett Manufacturing Company1917-11-20Imagedha_scp
97 Barrett Manufacturing Company1917-11-20Imagedha_scp
98 Barrett Manufacturing Company1917-11-20Imagedha_scp
99 Barrett Manufacturing Company Booth at Product Show1915-04-06Imagedha_scp
100 Bear River Power Company Interior General View of Plant, Westinghouse Electric Company1912-04-15Imagedha_scp
76 - 100 of 1,052