Constellation Similarity Assertions

  1. Portland Gold Mining Company
  2. Similarity Assertions

Portland Gold Mining Company

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Portland Mining Company

http://n2t.net/ark:/99166/w6716ctx (corporateBody)

Between 1890 and 1895 the original Portland Mining Company developed a property on the west slope of Sunset Peak, but the zinc ores exposed in the Silver Tip tunnel proved valueless because there was no proper method of separation from the lead associated with them. After 1917 Eugene Day undertook further development under the name West Sunset Mining Company. Although the Days invested between $75,000 and $80,000 little ore was found and on September 29, 1921, the mine was closed. ...

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Portland Mining Company.

http://n2t.net/ark:/99166/w6dg2xdp (corporateBody)

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Portland Mining Company.

http://n2t.net/ark:/99166/w6nd2sx7 (corporateBody)

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