-------- Original Message -------- Subject: Question on cataloging what I think are old blackline prints Date: Tue, 30 Mar 2010 10:29:51 -0500 From: Susan Moore <[log in to unmask]> To: [log in to unmask] Dear collective wisdom: I'm cataloging a group of maps from the Iowa State Planning Board from the late 1920s to mid 1930s. They look to be blackline prints but there are several that look like negatives, though they're on paper. I haven't seen anything else like this and was wondering if anyone else has encountered something like this. Thanks! Susan Moore University of Northern Iowa Cedar Falls, IA 50613 [log in to unmask]