1. Astronomie   philosophy   algebra   astronomy   geography   Hint Half-n-half Clue   2. Infinitesmalrechnung   calculus   biology   algebra   history   Half-n-half Clue   3. Geschichte   geography   trigonometry   history   zoology   Half-n-half Clue   4. Geometrie   zoology   geometry   biology   trigonometry   Half-n-half Clue   5. Erdkunde   calculus   geography   philosophy   botany   Half-n-half Clue   6. Physik   astronomy   botany   philosophy   physics   Half-n-half Clue   7. Psychologie   algebra   psychology   philosophy   astronomy   Half-n-half Clue