1. hypnology   languages and linguistics   earthquakes and related phenomena   sleep   fish   Hint Half-n-half Clue   2. entomology   insects   matter and its properties   fingerprints for identification purposes   dance and ballet compositions   Half-n-half Clue   3. ethics   nervous system with its functions and diseases   moral principles   society and family life   heredity and related laws   Half-n-half Clue