ether ▁as ▁an ▁an a est h etic ▁in ▁Britain ▁( for ▁a ▁dent al ▁procedure ) ▁was ▁in ▁his ▁house ▁at ▁ 2 4 ▁G ower ▁Street ▁on ▁ 1 9 ▁December ▁ 1 8 4 6 . ▁This ▁is ▁comm emor ated ▁by ▁a ▁pla que ▁on ▁the ▁London ▁School ▁of ▁H yg iene ▁and ▁Trop ical ▁Medicine ▁which ▁now ▁stands ▁on ▁the ▁site . ▁A ▁few ▁days ▁later ▁a ▁surg ical ▁operation ▁under ▁ ether ▁was ▁carried ▁out ▁by ▁Robert ▁List on ▁at ▁University ▁College ▁Hospital ▁nearby . ▁ ▁As ▁far ▁back ▁as ▁ 1 8 1 9 ▁he ▁had ▁become ▁a ▁fellow ▁of ▁the ▁Lin ne an ▁Society , ▁and ▁his ▁le is ure ▁now ▁permitted ▁him ▁to ▁accept ▁the ▁office ▁of ▁secretary , ▁which ▁he ▁held ▁from ▁ 1 8 3 2 ▁to ▁ 1 8 3 9 . ▁He ▁was ▁appointed ▁tre as urer ▁in ▁November ▁ 1 8 5 6 , ▁which ▁place ▁he ▁res igned ▁in ▁May ▁ 1 8 6 1 , ▁ ▁His ▁botan ical ▁lab ours ▁were ▁entirely ▁continued ▁to ▁the ▁study ▁of ▁the ▁great ▁genus ▁Care x . ▁ ▁The ▁results ▁of ▁his ▁lab ours ▁have ▁seen ▁the ▁light ▁in ▁a ▁large ▁fol io ▁work ▁entitled ▁Illustr ations ▁of ▁the ▁Gen us ▁Care x , ▁by ▁F . ▁Bo ott , ▁M . D . ▁In ▁four ▁parts ▁London , ▁ 1 8 5 8 - 6 7 . ▁ ▁It ▁was ▁produced ▁at ▁his ▁own ▁exp ense , ▁and ▁distributed