Picture Credits From the Transcontinental Railroad webpage
http://www.model-trains.biz/
http://www.gettysburgbattlefieldtours.com/lincoln-train-museum.php
http://www.visitsacandaga.com/history.htm
http://www.zazzle.ca/railroad_bridge_1800s_postcard-239908111421463187
http://en.wikipedia.org/wiki/Transcontinental_railroad
http://www.sfmuseum.org/hist1/rail.html
http://www.theworldwonders.com/industrial-trans-railroad.html
http://www.model-trains.biz/
http://www.gettysburgbattlefieldtours.com/lincoln-train-museum.php
http://www.visitsacandaga.com/history.htm
http://www.zazzle.ca/railroad_bridge_1800s_postcard-239908111421463187
http://en.wikipedia.org/wiki/Transcontinental_railroad
http://www.sfmuseum.org/hist1/rail.html
http://www.theworldwonders.com/industrial-trans-railroad.html