Re: ICC map abbreviations

Posted by Jeff Young on May 15, 2015; 2:44pm
URL: http://c-sng-discussion-forum.254.s1.nabble.com/ICC-map-abbreviations-tp2242p2283.html


http://digital.denverlibrary.org/cdm/singleitem/collection/p15330coll22/id/66245/rec/1

Interesting that straight-through is a vertical target.  Was that typical?  (I always thought a two way switch would use right and left, but I'm not sure where that idea came from....)

Jeff.