relativity and railroads

[Bob Norton]

At 10:21 AM 6/27/97 -0400, JULIUS RAPER <jrraper at email.unc.edu> wrote:
>	This is a question for all the polymaths out there on the  P-list:
>Is there a place where Einstein uses two trains traveling on parallel
>tracks as a metaphor explaining relativity--as T. Wolfe later does in OF
>TIME AND THE RIVER?  I have a vague memory that either he or Proust
>preceded Wolfe in the analogy.
>
I'm not sure about Einstein using that analogy but I'm pretty sure that
Bertrand Russell used it in his book on relativity which surely predates
Wolfe's. I wasn't aware that Proust ever explained relativity, but then I
haven't finished "Remembrance of Things Past".