-------- Original Message --------
Subject:        old USGS indexes
Date:   Tue, 14 Jun 2011 20:19:33 +0000
From:   Riley Moffat <[log in to unmask]>
To:     [log in to unmask] <[log in to unmask]>



Aloha all:

Rarely, but it does happen, a 7.5’ sheet will change its name which an
old index will show. Also, the most important reason is that as the USGS
lets topographic maps go out-of-print, they are dropped from the
indexes. This has happened to just about all 15’, 30’, 60’ and special
sheets. That’s why I created the “Map Index to Topographic Quadrangles
of the United States, 1882-1940” in 1985. Since then the newer 15’
sheets produced in the 1940s, 1950s, and 1960s have disappeared off the
indexes. All the special sheets such as mining districts and river
surveys have also disappeared, but are locatable in Peter Stark’s “A
Cartobibliography of Separately Published U.S. Geological Survey Special
Maps and River Surveys” both available from Western Association of Map
Libraries. If your library serves genealogists or historians, these are
good reasons to keep these indexes.

Riley Moffat, Senior Librarian

Brigham Young University – Hawaii