▁ 1 8 7 3 , ▁Dr . ▁Mac ad am ▁lect ured ▁at ▁the ▁" New ▁V eter inary ▁College " ▁hous ed ▁in ▁Gay field ▁House , ▁following ▁its ▁foundation ▁by ▁William ▁Williams ▁( 1 8 3 2 – 1 9 0 0 ) ▁in ▁ 1 8 7 3 . ▁He ▁was ▁one ▁of ▁the ▁original ▁six ▁staff ▁ ▁Dr . ▁Mac ad am ▁remained ▁on ▁the ▁staff ▁of ▁the ▁New ▁V eter inary ▁College ▁until ▁it ▁moved ▁to ▁its ▁newly ▁built ▁campus ▁at ▁El m ▁Row ▁in ▁ 1 8 8 3 , ▁when ▁he ▁res igned ▁in ▁favour ▁of ▁his ▁son ▁Professor ▁I vis on ▁Mac ad am . ▁( Pro f . ▁W . ▁I vis on ▁Mac ad am ▁was ▁generally ▁known ▁by ▁his ▁middle ▁name ▁I vis on ). ▁ ▁On ▁Dr . ▁Mac ad am ' s ▁ret irement ▁in ▁ 1 9 0 0 ▁he ▁had ▁completed ▁fifty ▁years ▁as ▁a ▁lect urer , ▁forty - five ▁of ▁which ▁had ▁been ▁as ▁an ▁independent . ▁ ▁He ▁also ▁had ▁a ▁large ▁analyt ical ▁chemical ▁consult ing ▁practice ▁and ▁was ▁sought ▁after ▁for ▁expert ise ▁in ▁his ▁field . ▁ ▁He ▁acted ▁as ▁Scient ific ▁Ad visor ▁to ▁the ▁Northern ▁L ighth ouse ▁Board ▁of ▁Scotland . ▁ ▁Lear ned ▁soci eties ▁▁ 1 8 5 4 ▁Fellow ▁( Pres ident ▁ 1 8 6 4 - 5 ) ▁of ▁the ▁Royal ▁Scottish ▁Society ▁of ▁the ▁Arts ▁( Que en ▁Victoria ' s ▁cons