8 5 2 ). ▁His ▁father ▁was ▁both ▁a ▁military ▁officer ▁and ▁phys ician . ▁He ▁was ▁a ▁brother ▁of ▁Heinrich ▁Arnold ▁Th a ul ow ▁and ▁Mor itz ▁Christian ▁Julius ▁Th a ul ow , ▁and ▁a ▁cousin ▁of ▁Hen rik ▁Wer gel and , ▁Camil la ▁Col lett ▁and ▁Joseph ▁Fr ant z ▁Oscar ▁Wer gel and . ▁ ▁He ▁was ▁an ▁app rent ice ▁chem ist ▁in ▁Old enburg ▁ ▁( 1 8 3 2 – 3 4 ) ▁and ▁at ▁Al ton a ▁( 1 8 3 4 – 3 6 ). ▁He ▁became ▁a ▁student ▁at ▁the ▁University ▁of ▁K iel ▁in ▁ 1 8 3 6 ▁and ▁tra ve led ▁the ▁same ▁year ▁to ▁Christian ia ▁( now ▁Os lo ). ▁Here ▁he ▁became ▁an ▁assistant ▁to ▁ ▁J ens ▁Jacob ▁Key ser , ▁professor ▁of ▁physics ▁and ▁chem istry ▁at ▁the ▁new ▁University ▁in ▁Christian ia ▁( 1 8 3 6 ▁to ▁ 1 8 4 2 ). ▁He ▁took ▁adj unct ▁exam ination ▁in ▁ 1 8 3 9 ▁and ▁in ▁ 1 8 4 3 ▁received ▁a ▁license ▁to ▁operate ▁a ▁ph arm acy . ▁ ▁He ▁established ▁the ▁ph arm acy ▁L ø ve ap ote ket ▁in ▁Christian ia ▁in ▁ 1 8 4 2 . ▁The ▁ph arm acy ▁made ▁Th a ul ow ▁very ▁wealth y . ▁Among ▁his ▁works ▁was ▁a ▁treatment ▁from ▁ 1 8 5 3 ▁on ▁the ▁influence ▁of ▁isomorphism ▁and ▁is ometry ▁on ▁the ▁development