est ▁solar ▁sal ine ▁operation ▁in ▁North ▁America , ▁in ▁Matthew ▁Town , ▁In agua , ▁The ▁Bah am as . ▁ ▁Mort on ▁Salt ' s ▁logo ▁features ▁the ▁" M orton ▁Salt ▁Girl ," ▁a ▁young ▁girl ▁walking ▁in ▁the ▁rain ▁with ▁an ▁opened ▁um bre lla ▁and ▁scatter ing ▁salt ▁behind ▁her ▁from ▁a ▁cyl ind rical ▁container ▁of ▁table ▁salt , ▁and ▁is ▁one ▁of ▁the ▁ten ▁best - known ▁symbols ▁in ▁the ▁United ▁States . ▁ ▁The ▁company ' s ▁logo ▁and ▁its ▁mot to , ▁" When ▁it ▁ra ins , ▁it ▁pour s ", ▁both ▁origin ating ▁in ▁a ▁ 1 9 1 4 ▁advert ising ▁campaign , ▁were ▁developed ▁to ▁illustrate ▁the ▁point ▁that ▁Mort on ▁Salt ▁was ▁free ▁flow ing ▁even ▁in ▁ra iny ▁weather . ▁The ▁company ▁began ▁adding ▁mag nes ium ▁carbon ate ▁as ▁an ▁absor bing ▁agent ▁to ▁its ▁table ▁salt ▁in ▁ 1 9 1 1 ▁to ▁ensure ▁that ▁it ▁pou red ▁freely . ▁However , ▁around ▁ 1 9 5 8 , ▁the ▁company ▁realized ▁that ▁their ▁salt ▁was ▁not ▁living ▁up ▁to ▁their ▁s log an . ▁A ▁chem ist , ▁Richard ▁A . ▁Pat ton , ▁was ▁given ▁the ▁assignment ▁to ▁solve ▁this ▁problem . ▁He ▁invent ed ▁a ▁machine ▁that ▁would ▁coat ▁the ▁salt ▁with ▁a ▁by product ▁of ▁salt ▁min ing , ▁mag nes ium ▁ox ide . ▁Cal ci um ▁sil icate ▁is ▁now ▁used ▁instead ▁for ▁the ▁same ▁purpose . ▁The ▁same ▁chem