-------- Original Message -------- Subject: 1930ish US Coast & Geodetic Survey charts Date: Wed, 03 Jun 2009 10:46:45 -0400 From: Joel Kovarsky <[log in to unmask]> To: Maps, Air Photo & Geospatial Systems Forum <[log in to unmask]> I am cataloging a few of these charts, and they are a good bit later than things I usually handle. I was wondering about the entries often seen in the left lower margins, often with a format such as "43-1/3; 45-12/9", etc. I gather someone on this list knows what those printed numbers mean, so I thought I'd ask. Most of the variants I'm seeing are not currently in WorldCat, but even for similar charts that are, those marginal numbers are not often listed Thanks in advance for any help.. Joel Kovarsky