[PT032AAG1], Technical Note, Thomas Alva Edison, July 27th, 1887
https://edisondigital.rutgers.edu/document/PT032AAG1
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Metadata
- Title
- [PT032AAG1], Technical Note, Thomas Alva Edison, July 27th, 1887
- Editor's Notes
- Dick-- Patent. The object of this invention is to prepare pyritious ores for seperation of their magnetic constituents from the other matter by my system of magnetic seperation shewn in patent _____ This being a link in the process of extracting gold from pyritious gangue; If have found that Bisulphide of iron or common iron pyrites is a very frequent gangue of gold ores and this is very slightly magnetic so that the most powerful magnets are required to alter the trajectory of the powdered material when falling. I have found that if the powdered pyrites be placed in a closed chamber and heated to a dull read heat the Bisulphide is reduced to protosulphide or fior and this increases its magnetism sufficiently to premit the use of less powerful magnets for its seperation. But if the operation of heating [following this is a complete draft in someone else's hand - see how this relates to Dickson's work up to this point]
- Author
- Edison, Thomas Alva
- Mentioned
- Dyer, Richard Nott
- Date
- 1887-07-27
- Type
- Technical Note
- Folder ID
- PT032AAG-F
- Microfilm ID
- 114:101
- Document ID
- PT032AAG1
- Publisher
- Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
- License
- CC0 1.0 Universal
- Has Version
- Archive.org Viewer, Microfilm Series Reel 114