Re: PRR, standards, etc

Tim O'Connor

Jeff Aley wrote

The Copeland collection in Harvard's Baker library has the
Ton-Mile maps for most Class 1 RR's. (There are far more Ton-Mile maps
than there are Interchange reports, to my dismay!)
Thanks, I should get over there some weekend... What do the maps look
like? Just bar graphs superimposed on geography, or thick lines (so you
have to multiply the line thickness times its length to calculate the


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