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Things to Find Out

Questions from the original Key to the Nature Library to send you back into Mosses and Lichens — and out of doors.

1. How does a moss change back and forth from brown to green?
2. What kind of moss acts as a barometer?
3. What peculiar properties belong to certain mosses in caverns?
4. What moss is grown in aquariums to keep the water fresh?
5. Out of what moss do Lapland mothers make cradles?
6. What moss, encrusted with a limy deposit from dripping water, forms a part of the rocky walls of Niagara Falls?
7. How do mosses prevent spring freshets in mountainous regions?
8. What is a quaking bog, and how does it cease to quake?
9. What is the formation of a peat bog?
10. How has nature reclaimed the inundated areas of Europe since 800 A. D.?
11. In what sense are mosses and lichens pioneers among plants?
12. How are mosses and lichens preserved by collectors?
13. How to know a lichen from a moss or a hepatic.
14. Is Florida or Spanish "moss" correctly named?
15. How are mosses and lichens soil-makers?
16. What three lichens are used as food?
17. What lichens are listed as drugs of merit in old books? Frontispiece.
18. What lichen furnishes grazing for reindeer?
19. What plant links the hepatics to the higher plants?
20. What was the manna of the Israelites?
21. What plant is in fact a close partnership between two unrelated plants which are mutually dependent?
22. Follow a moss through the different stages of its life history
23. What materials does the ruby-throated humming-bird use for its nest?