Across
- 2. What were copied by hand until the invention of printing press
- 5. Referred to as the first great invention
- 6. Invented by Romans
- 7. Probably the most significant medieval invention
- 8. Who was the wheel invented by
Down
- 1. Printing press was invented by
- 3. What kind of lightbulb was invented by Thomas Edison
- 4. What was the compass first used for