▁US ▁citizens hip ▁in ▁ 1 9 3 9 , ▁publishing ▁his ▁Princi ples ▁of ▁Development ▁the ▁same ▁year . ▁From ▁ 1 9 3 3 ▁to ▁ 1 9 5 4 , ▁after ▁working ▁briefly ▁at ▁Y ale , ▁he ▁taught ▁at ▁the ▁University ▁of ▁Chicago . ▁ ▁In ▁his ▁work ▁on ▁t issue ▁cult ures ▁We iss ▁out lined ▁several ▁features ▁of ▁cell ▁pro l ifer ation : ▁he ▁showed ▁how ▁cell - pattern s ▁are ▁affected ▁by ▁their ▁substr ate ▁and , ▁through ▁gra ft s , ▁proved ▁that ▁basic ▁neural ▁patterns ▁of ▁coord ination ▁were ▁self - d iffer enti ating ▁rather ▁than ▁learned , ▁though ▁higher ▁verte br ates ▁can ▁" ret rain " ▁ref lex es . ▁ ▁During ▁World ▁War ▁II ▁he ▁worked ▁with ▁the ▁American ▁government ▁on ▁n erve ▁injury . ▁In ▁ 1 9 4 7 ▁he ▁was ▁elected ▁to ▁the ▁National ▁Academy ▁of ▁Sciences . ▁In ▁ 1 9 5 4 ▁he ▁became ▁one ▁of ▁the ▁first ▁profess ors ▁at ▁the ▁new ▁Rock ef eller ▁University ▁in ▁New ▁York , ▁where ▁he ▁remained ▁for ▁fifteen ▁years . ▁Paul ▁We iss ▁was ▁awarded ▁the ▁National ▁Medal ▁of ▁Science ▁by ▁President ▁Jimmy ▁Carter ▁in ▁ 1 9 7 9 . ▁He ▁died ▁at ▁White ▁Pla ins , ▁New ▁York , ▁on ▁September ▁ 8 , ▁ 1 9 8 9 , ▁at ▁the ▁age ▁of ▁ 9 1 . ▁ ▁See ▁also ▁Organ ic ism ▁Mor ph ogen etic ▁fields ▁ ▁Bibli ography ▁▁ 1