ILLUSTRATIONS. 



PLATES. 



PagR 



,,„ .. ,,. ,. . Froiitisiiieie. 



Mliite I'lne lorest ' 



Plate I. Map showiug original distribution of White Pine (/'inns siio7j«s /,.) 11 



II. Fig. l.—Wliite Pine mixed with hardwood.s in central New Yorlc. Fig. 2.— Old White Pine tree in 



mixed forest (yonng pine in the foreground) in New York State 1- 



III. Map showing forest conditions of northern Wisconsin 1* 



IV. Fig. 1.— Transporting logs over ice road in Michigan. Fig. 2.— LumJ.er camp in Michigan 20 



\. Leaves and liud of the White Pine 



VI. Cones, seeds, etc., of the Wliite Pine 



VII. Sections of young shoot of White Pine 



VIII. Sections of wood of White Pine 26 



IX. Seedlings of Wliite Pine ~^ 



X. Fig. 1.— A thinned i)ino grove in New Hampshire. Fig. 2.— Young pine in New Hampshire 48 



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



XII. Di.sease of White Pine: Jrjariciis melleiis ^ 



XIII. Disease of White Pine: I'olyporus unnoxiis 54 



TEXT FIGURES. 



Fui. 1. Bark of old White Pine -^ 



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



Mich ; ^^ 



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



4. Girdled White Pine continuing to grow *" 



5. Dendrocionus frontuUa ^''^ 



6. Tomirus canigraphus "*_ 



7. Galleries of Tomiciis cacoiiraphun ''^ 



8. dnatliotrirhiia 7niiliritirii(s ^' 



9 GnlliTv of (SiKilliotrichua matiriarius ''° 



.t8 



10. Chiilcojihorii rinjiiiiennis • 



11. risHodc^ sirolii 



12. Larval mines under bark and pupal cells o( Pissodes strohi »9 



13. Lojihyrtis abbotii 



14. Tubes of pine leaves made by pine tube-builder *' 



15. Cliionaspis pinifoliw 



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



weight from the stump upward, and tlio similarity of tlie wood of ditterent trees 7t! 



17. Diagram showing specific weight of kiln-dry wood at diftercut points in the stem from ground upwar.l. 76 



18. Diagram sliowiiig eftect of moisture on crushing strength ™ 



10. Diagram showing rate of height growtli of dominant trees "•> 



20. Diagram sliowing rate of height growth of codominant trees 3* 



21. Diagram sliowing rate of height growtli of opjiressed trees *' 



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



23. Diagram showing volume growth of domiiKUit, codominant, and oppressed trees throughout range .. . 97 

 ?l. Diagram showing height growth of dominant trees, by States l*^ 



25. Diagram showing height growth of codominant trees, by States I'^l 



26. Diagram showing lieight growth of oppressed trees, by States "'^ 



27. Diagram showing volume growth of dominant trees, by States '"- 



28. Diagram showing vcdiime growth of codominant trees, by States 103 



29. Diagram showing volume growth of oppressed trees, by States !*'■' 



7 



