. ▁ ▁William ' s ▁second ▁wife ▁was ▁Helen ▁Stevens on ▁( 1 8 0 3 – 1 8 5 7 ) ▁with ▁whom ▁he ▁had ▁a ▁further ▁seven ▁children : ▁ ▁Helen ▁Gr ind lay ▁Mac ad am ▁ ▁John ▁Mac ad am ▁( Ste vens on ' s ▁el dest ▁full ▁brother ) ▁who ▁later ▁em igr ated ▁to ▁Australia . ▁ ▁Stevens on ▁Mac ad am , ▁the ▁subject ▁of ▁this ▁entry , ▁was ▁the ▁third ▁son . ▁ ▁Margaret ▁Mac ad am ▁ ▁Charles ▁Thomas ▁Mac ad am ▁a ▁younger ▁brother ▁became ▁senior ▁partner ▁in ▁Od ams , ▁a ▁fert il iser ▁company , ▁and ▁was ▁to ▁hold ▁the ▁Royal ▁W arr ant ▁as ▁Pur vey or ▁of ▁Chem ical ▁Man ures ▁[ fer til iser ] ▁to ▁Queen ▁Victoria . ▁ ▁George ▁Robert ▁Mac ad am , ▁his ▁young est ▁brother , ▁followed ▁his ▁older ▁brother ▁John ▁and ▁em igr ated ▁to ▁Australia . ▁ ▁Mary ▁El ison ▁Mac ad am ▁ ▁Education ▁ ▁Stevens on ▁studied ▁at ▁the ▁Glasgow ▁Mechan ics ▁Institution ; ▁College ▁of ▁Science ▁and ▁Arts ▁( now ▁the ▁University ▁of ▁Str ath c ly de ). ▁He ▁received ▁his ▁first ▁tu ition ▁at ▁the ▁Mechan ics ▁Institution ▁under ▁his ▁elder ▁brother ▁John ▁Mac ad am ▁after ▁whom ▁the ▁Mac ad am ia ▁nut ▁was ▁later ▁named . ▁ ▁He ▁received ▁his ▁doctor ate ▁( Ph D ) ▁from ▁Gi essen ▁University . ▁Wh ilst ▁in ▁Germany ▁he ▁also ▁spent ▁some ▁time ▁working ▁in ▁the