Exam study guide. Just part of it

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Across
  1. 4. invented the telephone
  2. 5. was a Spanish cowboy.
  3. 7. helped early telegraph communication.
  4. 10. was a type of cattle.
  5. 11. was the first place speech could be heard
  6. 12. invented the telegraph wire.
Down
  1. 1. was the federal land policy in 1862.
  2. 2. invented the transformer.
  3. 3. who's lab was in Menlo Park, NJ.
  4. 6. was first used to make automobiles.
  5. 8. was the first car Ford built.
  6. 9. was another word for plains farmers.