[LB006664], Letter from Thomas Alva Edison to John Bullock, December 14th, 1880
https://edisondigital.rutgers.edu/document/LB006664
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Title
[LB006664], Letter from Thomas Alva Edison to John Bullock, December 14th, 1880
Editor's Notes
Your favor of No 6th was duly rec'd. A machine costing [pound]500 will pass through 250 tons of sand per day requiring one man and a pair of horses. The sand must be dry. It dos not separate white quartz sand. The cheapness of the process depends upon the percentage of black sand.
Author
Recipient
Date
1880-12-14
Type
Subject
Folder/Volume ID
LB006-F
Microfilm ID
80:436
Document ID
LB006664
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University