[D8747AAA], Letter from Grace (W.R.) & Co to Samuel Insull, May 23rd, 1887
https://edisondigital.rutgers.edu/document/D8747AAA
→ View document with UniversalViewer
→ View document on Archive.org
→ Re-use this digital object via a IIIF manifest
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
Recipient
Mentioned
Date
1887-05-23
Type
Folder/Volume ID
D8747-F
Microfilm ID
120:132
Document ID
D8747AAA
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University