Fahrenheit 451 puzzle 1

12345678
Across
  1. 4. symbol of the profession of firemen
  2. 8. the temperature at whichs books burn
Down
  1. 1. architechs stop putting these on houses
  2. 2. what do firemen burn?
  3. 3. how long has book burning been practiced?
  4. 5. who is the fire chief?
  5. 6. used by firefighters to burn books
  6. 7. what is the consequence of keeping books?