344 



FORESTRY INVESTIGATIONS U. S. DEPARTMENT OP AGRIOl'LTIJRE. 



hydrocarbons, (.'>) rosin, (-4) ratio ,-,; (2) and (3) as (Calculated on wood free from moisture, 

 instance, for tree No. 53, disk IV, .s-2, we find 



For 



40 = Number of rings. 

 0.40 = Per cent of volatile hydrocarbons. 

 3. 81 = Per cent of rosin. 



10.37= J. 



Tree 

 No. 53. 



40. 

 0.40 

 3.81 



10.37 



30. 



II. 4H 

 3.06 

 11.60 



34. 

 4.56 

 24.01 

 19. 02 



33. 



4.49 

 22.23 

 20.12 



31. 

 3.86 

 17.74 

 21.77 



85. 

 2.66 

 15.19 

 17.53 



40. 

 0.30 

 2.96 



13.01 



37. 

 0.42 

 3. 02 



13.82 



35. 

 3.87 



21.77 

 17.85 



38. 

 3.81 

 20.09 

 18.94 



30. 

 2.10 

 11.97 

 17.53 



18. 

 1.25 



a. 71 



13. 10 



0.18 

 0-.97 

 18.39 



40. 

 0.19 

 0.96 



19.77 



33. 

 2.56 

 12.02 

 I -JI.23 



32. 



4.3!) 

 24.70 

 22.43 



32. 

 2.22 

 12.30 

 18.29 



28. 

 1.46 

 8.% 



16.38 



35. 



32. 



34. 



30. 



30. 



40. 



Tree 

 No. 61. 



30. 

 0.22 

 3.01 

 7.35 



35. 



0. '1(\ 



3.01 



6.5(1 



30. 



0.28 

 2.75 

 10. 20 



40. 

 3.07 

 13.55 

 22.05 



33. 

 3.49 

 16.29 

 21.42 



35. 

 3.14 

 14.18 

 21.42 



30. 

 1.08 

 8.04 



13.39 



35. 

 0.26 

 3.11 



36. 



1.57 

 7.88 

 19. 85 



33. 



2.69 

 IS. 57 

 19.86 



30. 

 2.92 

 11.34 

 25.81 



35. 

 0.75 

 5.67 



13.28 



30. 

 0.16 

 2.32 

 7.02 



27. 

 0.24 

 2.66 

 9.09 



I 



28. 

 0.84 

 5.35 



15.59 



36. 

 0.41 

 3.13 



12.85 



40. 



Tree No. 60. 



30. 

 0.28 

 2.65 



10.33 



SO. 



0.29 

 2.26 

 12.74 



34. 

 0.35 

 2.88 



12.16 



30. 

 0.58 

 3.60 



15.27 



1 



0. 40 

 2.99 

 13.23 



I 



36. 

 0.42 

 2.42 



17.04 



0.50 

 3.39 

 14.70 



35. 

 0.33 

 2. 63 



12.56 



37. 

 0.71 

 5.03 

 I 14. 07 



33. 

 0.51 

 2.71 



18.62 



35. 



0.73 

 5.19 

 14.03 



27. 

 0.47 

 3.62 



13.00 



30. 



28. 



32. 



19. 



Tree No. 1. 



30. 

 0.31 

 2.52 



12.12 



36. 

 0.34 

 2.71 



12.36 



30. 

 1.13 

 8.10 



13. 98 



30. 

 0.87 

 6.41 



13.53 



Tree No. 2. 



I 



30. 

 0.18 

 1.95 



8.94 



36. 

 0.24 

 2.24 



10. 06 



1.37 

 9.14 

 14.77 



28. 

 0.92 

 5.89 



15.61 



17. 

 0.86 

 7.40 



11.64 



30. 

 0.20 

 4.29 

 4.56 



26. 

 0.31 

 3.05 



10.00 



34. 

 1.55 

 10.10 

 15. 35 



1.93 

 14.19 

 14 4 



30. 

 1.39 

 8.78 



15.75 



11. 

 1.16 

 8.94 



12.99 



Flo. 90.-I>iagram of detail analyses, representing radial dimensions of test pieces in ca.-i, disk. Scale, one- half natural si/. 



IV. 



III. 



II. 



IV. 



III. 



II. 



III. 



II. 



IV. 



III. 



II. 



IV. 



III. 



II. 



IV. 



III. 



II. 



