LLUSTRATIONS. 



PLATES. 



Page. 



PLATE I. A group of hickories in Putnam County, Tenn Frontispiece. 



II. Fig. 1. Spoke bolts cut from pignut hickory. Fig. 2. Waste in 



hickory bolts cut for spokes 16 



III. Fig. 1. Taproot of bitternut. Fig. 2. Root sucker of hickory 16 



IV. Fig. 1. A group of stump sprouts of pignut. Fig. 2. Hickory 



sprouts coming up from the roots 32 



V. A plantation of big shellbark 27 years old 64 



VI. Fig. 1. Reproduction of hickory in a field. Fig. 2. A young stand 



of hickory after cutting 64 



TEXT FIGURES. 



FIG. 1. Pecan (Hicoria pecan} 14 



2. Water hickory (Hicoria aquatica) 15 



3. Nutmeg hickory (Hicoria myristicseformis) 16 



4. Bitternut (Hicoria minima) 17 



5. Shagbark (Hicoria ovata) 18 



6. Big shellbark (Hicoria ladniosa) 19 



7. Pignut (Hicoria glabra) 20 



8. Small pignut (Hicoria odorata) 21 



9. Mockernut (Hicoria alba) 22 



10. Ranges of the pecan hickories 23 



11. Ranges of the true hickories 24 



12. Strength and work as affected by specific gravity 47 



13. Spoke test chart, showing relation between resilience factor and weight. 48 



14. Strength and work as affected by rate of growth 49 



15. Strength, work, and specific gravity as affected by position in the tree. . 51 



16. Strength, work, and specific gravity as affected by height above 



ground 53 



17. Relative values of the various species of hickory 56 



5 



