1. anemology   heredity and related laws   origin and nature of the universe   wind   mathematics of pressures of liquids in motion   Hint Half-n-half Clue   2. optics   teeth   blood   light with its nature and properties   secret writings   Half-n-half Clue   3. genealogy   family histories and ancestries   fish   nervous system with its functions and diseases   map-making   Half-n-half Clue