344 FORESTRY INVESTIGATIONS U. S. DEPARTMENT OF AGRICULTURE. 



T 

 hydrocarbons, (3) rosin, (4) ratio •«; (2) and (3) as calculated on wood free from moisture. For 



instance, for tree "No. 53 ? disk IV, s2, we find — 



40 = Number of rings. 

 0,40 = Per cent of volatile hydrocarbons. 

 3. 81 = Per cent of rosin. 



10.37 = ^. 



40. 30. 34. 33. 31. 35. 



0.40 0.46 4.56 4.49 3.86 2.66 



3.81 3.96 24.01 22.23 17.74 15.19 



Tree | 10.37 [ 1160 | 19.02 j 20.12 [ 21.77 [ 17. 53 



No. 53. 40. 37. 33. 38. 30. 18. 



0.39 0.42 3.87 3.81 2.10 1.25 



2.96 3.02 21 77 20.09 11.97 9.71 



I 13.01 I 13.82 I 17.85 I 18.94 I 17.53 I 13.10 



37. 40. 33. 32. 32. 28. 



0.18 0.19 2.56 4.39 2.22 1.4C 



0.97 0.96 12.02 24.70 12.30 8.96 



18.39 | 19.77 I 21.23 I 22.43 I 18.29 I 16.33 









40. 



33. 



32. 



34. 





30. 





30. 













0.26 



0.34 



0.15 



0.22 





0.23 





0.26 













1.40 



1.34 



1.65 



1.97 





1.72 





1,92 







Tree 



No 52 



40 



18. 78 | 



25.20 



I 0. 33 



| 11.11 



1 



13.38 





| 13. 64 







30. 



30. 





30. 



32. 





27. 







11. 





0.25 





0.25 



0. 15 





0.20 



0.14 





0. 



18 





0.18 





1.99 





1.87 



1.77 





1.&7 



1.86 





1. 



60 





1.53 





1 12. 71 



1 



33.67 



1 8.64 



1 



10.51 



| 7.65 





9. 



05 



1 



9.26 





40, 





40. 



36. 





32. 





35. 







24. 







0.30 





0.31 



0.30 





0.26 





17 







0.17 







2.19 





2.01 



2.17 





1.83 





1.98 







1.51 







! 13. 64 



! 



15.48 



| 14. 14 





| 14. 38 



1 



8.83 





I 



11.60 







40. 33. 35. 30. 



3. 07 3 49 3. 14 1. 08 



13.55 16.29 14.18 8.04 



Tree I 7.35 I 10.20 J 22.65 | 21.42 | 21.42 | 13.39 



30 



36. 



0. 22 



0.28 



3.01 



2.75 



7.35 



10.20 



35. 



35. 



0.20 



0.26 



3.01 



3.11 



1 6.50 



I 8.36 



3SQ.61. 35. 35. 36. 33. 30. 35. 



1. 57 2 69 2. 92 0. 73 



7 88 13.57 11.34 5.67 



I 19.85 19 86 I 25.81 I 13.28 



30. 27 2S 36. 40. 



0. 16 24 0. 84 0. 41 



2. 32 2 66 5. 35 3 13 



7. 02 | 9 09 | 15. 59 | 12. 85 | 



30. 34. 30. 36. 36. 20. 



m XT „ A 0.28 0.35 0.58 0.40 0.42 0.50 



Tree JNo. 60. 2.65 2.88 3.60 2.99 2.42 3.39 



f 10.33 | 12.16 J 13.27 | 13 23 | 17.04 [ 14.70 



30. 33. 37. 33. 35. 27. 



0.29 0.33 0.71 0.51 0.73 0.47 



2.26 2.63 5.03 2 71 5.19 3.62 



12.74 | 12.56 I 14 07 I .18 62 | 14.03 I 13.00 





30. 



28. 



32. 



19. 









0.22 



0.25 



1.07 



1. 



06 







1.43 



1.57 



7.61 



6.62 





1 



15. 27 | 

 33. 



15. 97 | 



30 



14.12 



| 16. 04 





30. 



25. 





13. 





32 



34 



0.94 



73 





0.40 





2.25 



2. 25 



4.90 



5 12 





3.57 





I 14. 49 



| 13. 90 



| 19. 11 



I 14 21 



1 



11.20 





30. 



35 



35. 



34. 





15. 





0.20 



0.17 



18 



0.66 





0.37 





1.06 



1.32 



6 57 



3.92 





2.23 





18 55 | 



13. 72 I 



17.97 I 



16.67 



1 



16.50 





IV. 



III. 



II. 



IV. 





IT. 



III. 



II. 



IV. 



III. 



II. 



IV. 



Tree No. 1. | 14.49 1 13.90 | 19.11 | 14 21 | 11.20 III. 



II. 



30. 30. 30. 30. 



0.31 0.34 1.13 0.87 



2. 52 2. 71 8. 10 6 41 



12.12 | 12.36 | 13.98 | 13.53 



30. 36. 33. 28 17. 



18 0. 24 1. 37 0. 92 0. 86 



1.95 2.24 9.14 5 89 7.40 



Tree No. 2 | 8.94 1 10 06 j 14.77 | 15 61 | 11.64 



30. 26. 34. 30. 30. 11. 



0.20 0.31 1.55 1.93 1.39 1.16 



4. 29 3. 05 10. 10 14. 19 8 78 8. 94 



I 4. 56 I 10. 00 I 15. 35 I 14 4 I 15 73 I 12. 99 



IV. 



III. 



II. 



Pig. 90.— Diagram of detail analyses, representing radial dimensions of test pieces in each disk. Scale, one-half natural size. 



