Across
- 5. death instinct
- 6. are made of bricks died out in the sun
- 10. located on the southernmost tip of ancient Mesopotamia
- 12. current thoughts, feeling and focus
- 13. Most influential figure in medicine
- 14. portion of the mind in which morality and higher principles reside
- 16. One of the greatest feats of Roman Engineering
- 17. first known newspaper
- 18. direct generator that creates direct current using a commutator
- 19. bringing forth; making or producing something for a purpose
Down
- 1. patient of Dr. Freud’s colleague
- 2. first to explain the world in terms of law
- 3. unhiddenness or disclosure
- 4. the theory of evolution of species by natural selection
- 7. pictures or designs made by setting small pieces of stone, glass and tile
- 8. seeks to invent new or improved tools and materials
- 9. most useful medieval inventions
- 11. Created a body of theory
- 15. perfect element
- 20. for production of paper and cloth