[D8950AAM], Letter from Lewis Miller to Thomas Alva Edison, July 9th, 1889

https://edisondigital.rutgers.edu/document/D8950AAM

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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

Date

1889-07-09

Decade

1880-1889

Type

Folder/Volume ID

D8950-F

Microfilm ID

126:1105

Document ID

D8950AAM

Publisher

Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
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