Date: Sat, 27 Jul 2013 09:04:25 -0400
Subject: [WSFA] Olde Technology
From: Michael Walsh <walshmichaelj at gmail.com>
To: WSFA Official List <wsfa-forum at yahoogroups.com>, WSFA members <WSFAlist at keithlynch.net>
Reply-To: WSFA members <WSFAlist at KeithLynch.net>

Before radio beacons and the like .. Arrows!
http://www.core77.com/blog/transportation/what_are_these_giant_concrete_arrows_across_the_american_landscape_25236.asp

mjw