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Dear Maps-L Readers:
 
This morning I received a request, second hand from reference.  A patron is trying to locate a type of map.  The second hand informatin is this:
 
A map(s) of the Earth showing how certain parts f the earth are lighted at specific times.  It didn't specify whether the time is seasonally or daily, etc..
 
Does anyone have a lead as to where I can locate this type of map?
 
Thanks in advance,
 
Mary Yarrington
Map Collection Supervisor
UWEC, Eau Cllaire, WI            :-) "[log in to unmask]"