8. What has the flight of dragon-flies been called?
9. Tell me about the dragon-fly’s wonderful eyes.
10. Is the dragon-fly an eater or a drinker?
11. Where does the dragon-fly live while egg, larva, and pupa?
12. How do the eggs get into the water?
13. Tell me about the dragon-fly pupa.
14. Tell me about the queer mouth of the larva.
15. Tell me how he catches his food.
16. How does the larva get air while he lives under water?
17. Where did the pattern of a stern wheel, or screw boat, come from?