Editors. "Morrill Tariff is passed in USA". The Literary Encyclopedia. First published 30 December 2011
[http://www.litencyc.com/php/stopics.php?rec=true&UID=18409, accessed 11 March 2014.]
After the passing of a low tariff in 1857, Justin Morrill pushes a higher tariff through the American Congress, after many Southern representatives opposed to such protectionist policies had left Washington in the build-up to the Civil War.