Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Black Hills & Fort Pierre Railroad Roundhouse, Terraville Avenue & Sun...
Significance: Begun in 1881 as the first railroad in the Black Hills, the Black Hills & Ft. Pierre has played an important role in the growth of the Homestake Mining Company, the region's largest mining concern... More
Black Hills & Fort Pierre Railroad Roundhouse, Terraville Avenue & Sun...
Significance: Begun in 1881 as the first railroad in the Black Hills, the Black Hills & Ft. Pierre has played an important role in the growth of the Homestake Mining Company, the region's largest mining concern... More
Black Hills & Fort Pierre Railroad Roundhouse, Terraville Avenue & Sun...
Significance: Begun in 1881 as the first railroad in the Black Hills, the Black Hills & Ft. Pierre has played an important role in the growth of the Homestake Mining Company, the region's largest mining concern... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Black Hills & Fort Pierre Railroad Roundhouse, Terraville Avenue & Sun...
Significance: Begun in 1881 as the first railroad in the Black Hills, the Black Hills & Ft. Pierre has played an important role in the growth of the Homestake Mining Company, the region's largest mining concern... More
Black Hills & Fort Pierre Railroad Roundhouse, Terraville Avenue & Sun...
Significance: Begun in 1881 as the first railroad in the Black Hills, the Black Hills & Ft. Pierre has played an important role in the growth of the Homestake Mining Company, the region's largest mining concern... More
Lead City Mines and Mills. The Great Homestake Mines and Mills
Distant view of mining town; hills in background. Copyright deposit. Title transcribed from item. Forms part of the John C. H. Grabill Collection.
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Black Hills & Fort Pierre Railroad Roundhouse, Terraville Avenue & Sun...
Significance: Begun in 1881 as the first railroad in the Black Hills, the Black Hills & Ft. Pierre has played an important role in the growth of the Homestake Mining Company, the region's largest mining concern... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Black Hills & Fort Pierre Railroad Roundhouse, Terraville Avenue & Sun...
Significance: Begun in 1881 as the first railroad in the Black Hills, the Black Hills & Ft. Pierre has played an important role in the growth of the Homestake Mining Company, the region's largest mining concern... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
[Panoramic view of Lead], Panoramic Photograph
H9306 U.S. Copyright Office Copyright deposit; Clinton DeForest Curtis; October 4, 1901. Copyright claimant's address: Lead, S.D. Title derived from copyright deposit records. No. 1.
Black Hills & Fort Pierre Railroad Roundhouse, Terraville Avenue & Sun...
Significance: Begun in 1881 as the first railroad in the Black Hills, the Black Hills & Ft. Pierre has played an important role in the growth of the Homestake Mining Company, the region's largest mining concern... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Homestake gold mine, Lead, S. Dak. flash-light photographs of the unde...
Photograph shows interior of large mine with timber supports; two men stand atop wood beam structure. Photo and copyright 1908 by W. B. Perkins, Jr., Lead, S. Dak. Additional title on item: Flash-light photogra... More
Black Hills & Fort Pierre Railroad Roundhouse, Terraville Avenue & Sun...
Significance: Begun in 1881 as the first railroad in the Black Hills, the Black Hills & Ft. Pierre has played an important role in the growth of the Homestake Mining Company, the region's largest mining concern... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Black Hills & Fort Pierre Railroad Roundhouse, Terraville Avenue & Sun...
Significance: Begun in 1881 as the first railroad in the Black Hills, the Black Hills & Ft. Pierre has played an important role in the growth of the Homestake Mining Company, the region's largest mining concern... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More
Bald Mountain Gold Mill, Nevada Gulch at head of False Bottom Creek, L...
Significance: The technology used at Bald Mountain Gold Mill provides an excellent illustration of the development of the cyanide process of gold milling in the first half of the twentieth century. Historicall... More