1. physiology   nervous system with its functions and diseases   secret writings   organs in living beings with their functions   teeth   Hint Half-n-half Clue   2. odontology   teeth   mathematics of pressures of liquids at rest   antiquities   stamps   Half-n-half Clue   3. neurology   nervous system with its functions and diseases   wind   map-making   influence of numbers on human destinies   Half-n-half Clue