Re: Covered hopper bulk loads


Anthony Thompson <thompson@...>
 

Al Brown wrote:
Salt will get a paved road clear, of course, by lowering the freezing
point of water and melting the snow off the road.
Sort of. Actually, it makes a water-salt solution whose freezing point is lower than water.

If it's too cold out
that doesn't work, so in very cold parts of the country (e.g. Montana)
sand is common to this day.
True. The water-salt eutectic (minimum attainable temperature) is around 10 degrees F, IIRC. Below that you don't have liquid any more.

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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