[D8747AAA], Letter from Grace (W.R.) & Co to Samuel Insull, May 23rd, 1887
https://edisondigital.rutgers.edu/document/D8747AAA
PDF: Archive.org
CSV: Metadata
Metadata
- Title
- [D8747AAA], Letter from Grace (W.R.) & Co to Samuel Insull, May 23rd, 1887
- Editor's Notes
- "We have an inquiry from South America in reference to the 'Edison' Ore Separator and would request you to give us the information asked for in the enclosed memorandum." Enclosure: "Edison Ore Separation ## 1st Cost of separator in American Gold ## 2nd Gross & Net weight of the machine with all its implements ## 3rd Capacity of the separator per hour for each size ## 4th How long the electric batteries last, how are they replaced cost of replacing & of the ingredients used ## 5th Detailed explanation of how to separate the gold falling into the electric magnet face is it done all by itself? is it necessary to wash the minerals? ## 6th If the separation is to be used in washers or mines or if it separates the dust quartz & other substances or if those must be pulverized ## 7th Detailed information & simplest explication on the use of the separation ## OVER ## The separator only separates gold from magnetic iron sand -- If the iron sand is mixed with quartz then gold & quartz will jam one side & the magnetic iron sand or the others = It is only useful when the gold is found in alluvial soil with large quantity of iron sand ## It requires a 3 horse power Engine & boilers a 3 horse power Dynamo & separator -- ## Cost Engine & Boiler (Baxter) $300 -- Dynamo $250 -- Separator $850 -- ## The same Engine & Dynamo will run 2 separators -- Each separator will separate 100 tons of iron sand in 10 hours."
- Author
- Grace (W.R.) & Co
- Recipient
- Insull, Samuel
- Mentioned
- Edison, Thomas Alva
- Date
- 1887-05-23
- Type
- Letter
- Folder ID
- D8747-F
- Microfilm ID
- 120:132
- Document ID
- D8747AAA
- Publisher
- Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
- Has Version
- Archive.org Viewer, Microfilm Series Reel 120
- Item sets
- [D8747-F] (D-87-47) Mining -- General