Although CN did not purchase "new" domes like CP, they leased 3 "short" comes from C&O for a number of years, and purchased 6 "superdomes" and 6 "Skytop" observation cars from Milwaukee Road. History and current location of all the cars at http://community.webtv.net/domecars/x
CN Lines has been doing a lot of great articles, or i guess a series on CN passenger cars. And of course they have coverd the dome cars they owned. It is a great series and if you are interested in CN passenger equipment than you should really get a copy if you don't have one. ------------------ //BC Rail King
Morning Sun Books has just released a beautiful color guide on CN Passenger and non-revenue equipment by John Riddell. Has some very good pics and info on these cars.