▁materials ▁and ▁agricult ural ▁produce , ▁especially ▁tim ber ▁and ▁whe at , ▁as ▁goods ▁admitted ▁duty - free ▁to ▁the ▁U . S . ▁market . ▁The ▁treat y ▁ended ▁the ▁American ▁ 2 1 % ▁tar iff ▁on ▁natural ▁resource ▁imports . ▁In ▁exchange , ▁the ▁Americans ▁were ▁given ▁fish ing ▁rights ▁off ▁the ▁East ▁Coast . ▁The ▁treat y ▁also ▁granted ▁a ▁few ▁navigation ▁rights ▁to ▁each ▁other ' s ▁la kes ▁and ▁rivers . ▁ ▁The ▁treat y ▁represented ▁an ▁attempt ▁by ▁American ▁manufact ur ers ▁to ▁en large ▁their ▁export ▁market ▁and ▁to ▁obtain ▁che aper ▁raw ▁materials ▁and ▁an ▁attempt ▁by ▁free ▁trad ers , ▁tar iff ▁reform ers , ▁and ▁their ▁Democratic ▁Party ▁al lies ▁to ▁lower ▁the ▁tar iff . ▁The ▁protected ▁interests , ▁represented ▁by ▁the ▁Republican ▁Party , ▁fought ▁back . ▁ ▁Effect s ▁Histor ians ▁have ▁agreed ▁the ▁impact ▁was ▁small ▁for ▁the ▁United ▁States ▁but ▁have ▁deb ated ▁its ▁effects ▁on ▁Canada . ▁After ▁the ▁treat y ▁took ▁effect , ▁there ▁was ▁a ▁large ▁increase ▁in ▁Canada ' s ▁exports ▁to ▁the ▁United ▁States ▁and ▁a ▁rapid ▁growth ▁of ▁the ▁Canadian ▁economy , ▁especially ▁in ▁southern ▁Ontario . ▁Canadian ▁exports ▁to ▁the ▁United ▁States ▁grew ▁by ▁ 3 3 % ▁after ▁the ▁treat y , ▁but ▁American ▁exports ▁grew ▁by ▁only ▁ 7 %. ▁Within ▁ten ▁years , ▁trade ▁had ▁double d ▁between ▁the ▁two ▁countries . ▁For ▁nearly ▁a ▁century , ▁Canadian ▁econom ists ▁saw ▁the ▁reci pro city ▁era