Re: Coke Cars


Anthony Thompson <thompson@...>
 

David Smith wrote:
The iron ores in both places were magnetite and so the fine
sizes of unsintered ore would have had this really annoying tendency to
stick to metal objects, such as hopper cars.
I don't think so. Natural magnetite can be magnetized with a strong field, but isn't particularly attracted to iron by itself. Any such effect would be weak, compared to fine-particle effects themselves. We've all seen dust cling to things without any magnetism involved.

Tony Thompson Editor, Signature Press, Berkeley, CA
2906 Forest Ave., Berkeley, CA 94705 www.signaturepress.com
(510) 540-6538; fax, (510) 540-1937; e-mail, thompson@signaturepress.com
Publishers of books on railroad history

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