----------------------------Original message----------------------------
  This seems like it should be straight-forward but flailing around
in our government documents (we're only a partial depository and
don't have 19th c. things from the Naval Observatory, the C&GS  or
the proceeding of the 1884 prime meridian conference),the Web,  and
our books on longitude / time / cartography I haven't come up with an
answer.
  The patron is working in a federal office with some 19th c.
surveys measured from the Washington meridian. He needs an exact
longitude (from Greenwich) of the Washington meridian.   I can
find longitude in h,m,s for various  late 19th c. atsronomical
instruments and the 1893 observatory building.
 
 
Barbara Cox        <a href="/scripts/wa-UGA.exe?LOGON=A3%3D9801%26L%3DMAPS-L%26E%3D7BIT7BIT%26P%3D183627%26B%3D--%26T%3Dtext%252FplainTEXT%252FPLAIN%3B%2520charset%3DUS-ASCII%26pending%3D" target="_parent" >[log in to unmask]</a>
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