▁first ▁wife ▁was ▁Jean ▁Ray , ▁his ▁second ▁Bet sey ▁Williams , ▁with ▁whom ▁he ▁had ▁four ▁sons , ▁and ▁his ▁third ▁Susan ▁Co omb s , ▁with ▁whom ▁he ▁remained ▁for ▁the ▁last ▁ 3 5 ▁years ▁of ▁his ▁life . ▁ ▁H ess ▁died ▁on ▁September ▁ 1 5 , ▁ 2 0 1 5 ▁at ▁the ▁age ▁of ▁ 9 2 . ▁ ▁Education ▁ ▁H ess ▁attended ▁the ▁University ▁of ▁California ▁at ▁Ber keley , ▁where ▁he ▁earned ▁his ▁b ach elor ' s ▁degree ▁in ▁bio chem istry ▁in ▁ 1 9 4 8 ▁and ▁his ▁doctor al ▁degree ▁in ▁bio chem istry ▁in ▁ 1 9 5 2 .   ▁He ▁received ▁post do ctor al ▁organ ic ▁chem istry ▁training ▁as ▁a ▁fellow ▁for ▁the ▁National ▁Foundation ▁of ▁Inf ant ile ▁Par al ysis ▁at ▁M IT . ▁ ▁He ▁then ▁spent ▁ 6 0 ▁years ▁working ▁at ▁Corn ell ▁until ▁his ▁ret irement ▁in ▁ 2 0 0 5 . ▁ ▁Research ▁ ▁While ▁working ▁at ▁Corn ell , ▁H ess ▁conducted ▁research ▁on ▁a ▁variety ▁of ▁subjects ▁and ▁is ▁named ▁as ▁an ▁author ▁on ▁hundreds ▁of ▁articles .   ▁He ▁developed ▁las er ▁pul se ▁phot ol ysis ▁and ▁a ▁qu en ch ▁flow ▁technique , ▁both ▁used ▁to ▁visual ize ▁results ▁at ▁mill i - ▁and ▁micro second ▁time ▁intervals , ▁much ▁smaller ▁time ▁incre ments ▁than ▁had ▁been ▁available ▁before .   ▁Most ▁of ▁his ▁research ▁focused ▁on ▁the ▁ac et yl