8. Why are some raincoats called mackintoshes?

9. Why is Charles Goodyear called "the father of the rubber
industry"?

10. What is "vulcanizing"?

11. What famous men fought in court over the patents?

12. What has a beetle to do with rubber?

13. Name and describe the liquid in which rubber is found?

14. In what part of the tree is this liquid found?

15. What is the difference between this liquid and the sap of a
tree.

16. Name and describe the best rubber tree.

17. How are the seeds spread?

18. What climate is needed for rubber trees?

19. Which country formerly supplied all the rubber used in the
world?

20. Who first thought of growing rubber trees on plantations?

21. Why did he think it was better to grow them on plantations?