From: utzoo!decvax!harpo!seismo!hao!hplabs!hpda!fortune!dsd!atd!avsdS:steve Newsgroups: net.sf-lovers Title: RE: tractor beams--dates Article-I.D.: avsdS.394 Posted: Mon Mar 7 13:02:51 1983 Received: Thu Mar 10 02:02:09 1983 I'm not sure today, but I think the Lensmen series spans twenty years from the early Thirties to the Fifties. I'll have to check my "archived" bookshelf (the TOP one). steve