12. Corn. 
13. Oats. 
14. Turpentine. 
15. Barley. 
16. Rye. 
17. Wheat. 
18. Rice. 
19. Wood fiber products. 
20. Ferns. 
21. Peat. 
D. Hall 26. North American Trees. 
Each group is a monograph showing all the principal 
characteristics of the tree and wood. The trunk speci¬ 
mens are in exact size ratio each to the other. The 
Redwood trunk in the center of the hall is one-half 
the average size to which that species grows. The 
trunks in the cases are the same. Representative 
groups are mentioned. 
(East to West) 
1. Birch. 
2. Beech. 
3. Poplar. 
4. Gums. 
5. Laurel. 
6. Willows. 
7. Oaks. 
8. Spruces, Firs and Pines. 
9. Maples. 
10. Redwood. 
11. Magnolia. 
12. Hickory. 
13. Elms. 
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