De Primis Natvrae Ivris Natvralis Fontibvs Exponit : Ad Orationemqve Mvneris Adevndi Cavssa In Academia Vitembergensi Ad Diem XXVIIII Octobris A. Aer. Vvl. MDCCL Habendam Hvmanissime Invitat Ioannes Georgivs Walther Consiliarivs Saxonicvs Antea Ivris Natvrae Et Gentivm Prof. Pvbl Nvnc Vero Clementissime Constitvtvs Moralivm Et Civilivm Professor Pvblicvs Ordinarivs