ILLUSTRATIONS. 



PLATES. 



Pago. 

 Plate I. Longleaf Pine (Pinux jialiislrix) Frontispiece. 



II. Fig. 1. — Lougleaf Pine forest iu Luiii.siaua Hats, virgin, scorched by fire, as usual; Fig. 2. 



Longleaf Pine forest after removal of merchantable timber 27 



III. Map showing distribution of Lougleaf Pine and Cuban Pine : So 



IV. Pinus pahiKtris, bud and leaf 5q 



V. Plnua paliixlris, male and female flowers 52 



VI. Pin us palnxtrh, cone and seed 52 



VII. Pinvs palustris, seedlings and young plant 54 



VIII. Turpentiue orcharding in Louisiana (jg 



IX. Cuban pine flatwoods of Florida -j'l^ 



X, Plnns hetn-opliylla, male and female flowers 7g 



XI. Pinus hetn-ophjiUa, cone and seed gO 



XII. Shortleaf Pine {Pinus echinata), forest grown specimens iu Missouri jsr, 



XIII. Shortleaf Pine (Pinus eehinata), a roailside specimen in North Carolina 8(i 



XIV. Map showing distribution of Shortleaf Pine ^7 



XV. Finns echinata seedling; male and female liower, and leaf sections 94 



XVI. Pinus echinata cone, seed, and leaves gy 



XVII. Loblolly Pine (Pinus lada) j^^r, 



XVIII. Jlap showing distribution of Loblolly Pine 10^ 



XIX. Pinus tada, uialo flowers and leaves ]14 



XX. Pinus tu'da, female flowers, cone, and seed j K; 



XXI. Typical cross sections of I'iuus fada, hctenqihi/lla, and glabra IU 



XXII. Typical cross sections of Pinus jHilustris and eo/iinate, and radial sections of Pinus puluslris and 



glahra j4i; 



XXIII. Eadial sections of Pinus echiuata and hetcrophylla I4H 



XXIV, Radial sections of J'inus lada and tangential sections of Pinus jmluslris and echinata 1,50 



XXV. Tangential sections of I'inus tada, helerophijUa and ytalira 152 



XXVI. Tangential sections of Pinus echinata, hcterophiiHa, and ijlahra, showing number and distribution 



of pith rays and proporti(m of pith-ray cells J54 



XXVII. Transverse resin ducts — tangential views j5(; 



FIGURES. 



Fig. 1. Diagram showing variation of weight with height of tree K! 



2. Schematic section through stem of Longleaf Pine, showing variation of specific weight with height, 



diameter, and age at 20 (aim), 60 (dcd), 120 (ecec), and 200 (ffj'f) years ?...' 17 



.3. Diagram showing varir.tion of compression strength with nxoisture : o 



4. Diagram showing loss of water in kiln drying and reabsor|ition in air, shrinking and swelling 20 



5. Diagram showing comparative progress of height growth in average trees 22 



f). Diagram showing comparative progress of diameter growtli iu average trees 2'.\ 



7. Diagram showing comparative progress of volume growth in average trees 24 



8. Growth of Longleaf Pine in height, diameter, and volume 60 



0, Tools used in turjieutine orcharding 70 



10. Imiiroved method of turpentine orcharding 71 



11. Growth of Shortleaf Pine jDI 



12. Growth of Loblolly Pine T. "!. y. .!!..!!!... ^ ! ' I'l 



13. Variation of suuimerwood per cent from pith to liark bSC 



14. Variatiou of specific gravity wiih summerwood per cent and age of section 1,"7 



15. Variation of summerwood per cent with rate of growth ( width of ring) V.^X 



16. Schematic representation of coniferous wood structure V.id 



17. Cell endings in pine j3() 



18. Cross section of normal and stunted growth , . - 140 



9 



