▁based ▁on ▁his ▁inaug ural ▁disput ation ▁which ▁de alt ▁with ▁the ▁Roman ▁calendar ▁in ▁the ▁period ▁after ▁the ▁cons ulate . ▁ ▁Still ▁in ▁ 1 7 3 4 ▁he ▁briefly ▁re located ▁to ▁J ena , ▁and ▁then ▁Leipzig ▁where ▁he ▁heard ▁lect ures ▁on ▁As c etic ism ▁and ▁Ex eg esis , ▁and ▁also ▁attended ▁lect ures ▁by ▁Johann ▁Christoph ▁Gott sch ed ▁on ▁r het or ic ▁and ▁poetry ▁creation . ▁At ▁Leipzig ▁Nag el ▁also ▁received ▁support ▁from ▁Johann ▁Er hard ▁K app ▁and ▁Gott fried ▁M asc ov . ▁It ▁was ▁on ▁the ▁recommendation ▁of ▁M asc ov ▁that ▁he ▁published ▁a ▁descript ive ▁work ▁concerning ▁P to le my ' s ▁Ge ographical ▁writing , ▁which ▁ended ▁up ▁in ▁the ▁Leipzig ▁City ▁Library . ▁Nag el ▁was ▁able ▁to ▁deep en ▁the ▁extent ▁of ▁his ▁studies ▁through ▁the ▁Leipzig ▁library . ▁Rel ative ▁relax ation ▁after ▁his ▁studying ▁came ▁from ▁vis its ▁to ▁the ▁Colleg ium ▁Music um , ▁then ▁under ▁the ▁direction ▁of ▁Johann ▁Sebastian ▁Bach . ▁ ▁From ▁Leipzig ▁he ▁went ▁on ▁to ▁the ▁( then ▁separate ) ▁univers ities ▁of ▁Halle ▁and ▁W itten berg , ▁where ▁he ▁be fri ended ▁various ▁academ ics , ▁before ▁returning ▁to ▁Al td orf ▁in ▁ 1 7 3 6 . ▁Here , ▁in ▁ 1 7 3 7 , ▁he ▁successfully ▁def ended ▁a ▁dis sert ation , ▁thereby ▁receiving ▁his ▁hab il itation ▁( qual ification ) ▁and ▁obtain ing ▁a ▁lect ures