Across
- 2. 'survival of the fittest' appied to humans
- 5. classification of elements chart
- 6. electric incandescent lamp
- 8. chemical agents to destroy bateria in wounds
- 11. winged vehicle for transportation
- 12. line produced goods in a more efficient way
- 13. machine to remove seeds from cotton
Down
- 1. first electric generator
- 3. transmitted and received human voices
- 4. chemicall process which improved properties of rubber
- 5. an antibiotic which saved thousands from infections
- 7. increased the shelf life of foods
- 9. arrangement of dots and dashes; early communication
- 10. way to view bones in person or animal