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Ice in mouth of shaft on the Primos Mining and Milling Company's ground, 2 miles northwest of Nederland. Boulder County, Colorado. March 2, 1917.
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Adit No, 2 on the Primos Chemical Company's property, east side of Big Bear Creek, 2 1/2 miles south of Newmire. The adit is just under the limestone, which is present above the La Plata sandstone at all vanadiferous localities in this region. San Miguel County, Colorado. August 3, 1911.
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Form a panorama with photo 673. Open cut on the "Copeland property" of the Primos Exploration Company, South Boulder Creek, 1 1/2 miles north of Crescent station on the Moffat Road and 10 miles southwest of Boulder looking north. Boulder County, Colorado. March 6, 1917.
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Panorama of Primos Chemical Company's workings on the west side of Big Bear Creek, 2 1/2 miles above Newmire. San Miguel County, Colorado. August 4, 1911.
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Panorama of Primos Chemical Company's workings on the west side of Big Bear Creek, 2 1/2 miles above Newmire. San Miguel County, Colorado. August 4, l911.
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The Lone Pine shaft house of the Primos Mining Company, 2 1/2 miles northeast of Nederland. Boulder County, Colorado. September 4, 1909
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Form a panorama with photo 674 showing workings on the opposite side of the gulch from the Clyde mine. The Lone Tree mine of the Primos Mining and Milling Company is at the top of the hill in the right center, looking northwest and west. Boulder County, Colorado. February 27, 1917.
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Panorama of the Oregon, Conger, and Beddig shaft houses, one mile northwest of Nederland. The Oregon on the left belongs to the Wolf Tongue Mining Company; the Conger in the middle, to the Primos Mining Company, the Beddig to the Colorado Tungsten Corporation. The Conger is the best mine in the district. Boulder County, Colorado. September 7, 1909.