ILLUSTRATIONS. 



PLATES. 



Page. 

 White Pine forest Frontispiece. 



PLATE I. Map showing original distribution of White Pine (Pinus stratus L.) 11 



II. Fig. 1. White Pine mixed with hardwoods in central New York. Fig. 2. Old White Pine tree in 



mixed forest (young pine in the foreground) in New York State 12 



III. Map showing forest conditions of northern Wisconsin 14 



IV. Fig. 1. Transporting logs over ice road hi Michigan. Fig. 2. Lumber camp in Michigan 20 



V. Leaves and bud of the White Pine 22 



VI. Cones, seeds, etc., of the White Pine 23 



VII. Sections of young shoot of White Pine 26 



VIII. Sections of wood of White Pine 26 



IX. Seedlings of White Pine 27 



X. Fig. 1. A thinned pine grove in New Hampshire. Fig. 2. Young pine in New Hampshire 48 



XI. Fig. 1. Young pine in need of pruning. Fig. 2. Young pine pruned 50 



XII. Disease of White Pine: Agaricns melleus 54 



XIII. Disease of White Pine: PoJ.yporus annosus 54 



TEXT FIGURES. 



FIG. 1. Bark of old White Piue 21 



2. Diagram showing height growth of mixed and of pure growth White Pine in Presque Isle County, 



Mich 32 



3. Diagram showing height growth of White Pine in forest of varying composition in Pennsylvania 33 



4. Girdled White Pine continuing to grow 49 



5. Dendroctonu frontali> 55 



6. Tomicus cacographus 56 



7. Galleries of Tomicut cacoyrapluis 57 



8. Gnatliotrichui maU-riarius 57 



9. Gallery of Gnathotrichue materiariiu 58 



10. Chtilcojihora riryiniensii 58 



11. Pitsodes strobi 59 



12. Larval mines under bark and pupal cells of I'issodes strobi 59 



13. Lnphyras abbotii 60 



14. Tubes of pine leaves made by pine tube-builder 60 



15. Chionaspis pinifoliu: 60 



16. Diagram showing specific weight of wood at different cross sections of the stem; also a decrease of 



weight from the stump upward, and the similarity of the wood of different trees 76 



17. Diagram showing specific weight of kiln-dry wood at different points in the stem from ground upward. 76 



18. Diagram showing effect of moisture on crushing strength 80 



19. Diagram showing rate of height growth of dominant trees 93 



20. Diagram showing rate of height growth of codominaut trees , 94 



21. Diagram showing rate of height growth of oppressed trees 95 



22. Diagram showing height growth of dominant, codominant, and oppressed trees throughout range 96 



23. Diagram showing volume growth of dominant, codominaut, and oppressed trees throughout range ... 97 



24. Diagram showing height growth of dominant trees, by States 100 



25. Diagram showing height growth of codominant trees, by States 101 



26. Diagram showing height growth of oppressed trees, by States 101 



27. Diagram showing volume growth of dominant trees, by States 102 



28. Diagram showing volume growth of codominaut trees, by States 103 



29. Diagram showing volume growth of oppressed trees, by States 104 



7 



