[D8950AAM], Letter from Lewis Miller to Thomas Alva Edison, July 9th, 1889
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Title
[D8950AAM], Letter from Lewis Miller to Thomas Alva Edison, July 9th, 1889
Editor's Notes
"Enclosed I hand you a card containing analysis of that sifted iron ore, showing 41.5% iron; 5.48% silica; .048% phosphorus; .391% manganese; 4.66% alumina; and .141% sulphur. I hardly understand how this can be correct and yet it is by an established firm as you will see by the card. It doesn't seem as though we had added anything to the proportionate amount of iron even though we have taken half of the other material away. Write me your opinion about it." # Marginalia says "Something wrong. The total don’t [----] up 100 - The original ore had about 20 per cent iron. We simply raised the concentrate to 41.5 by tumbling. Propbably could get it to 45 per cent which is equivalent probably to a 55 per cent magnetic ore."
Author
Recipient
Date
1889-07-09
Type
Subject
Folder/Volume ID
D8950-F
Microfilm ID
126:1105
Document ID
D8950AAM
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University