NO, I GROWTH LAYERS IN TREE BRANCHES — CLOCK ET AL. IX 



Text Figures 



Page 



1. Types of lenses 60 



2. XSC 8-4-a. Increments for 1938-40 by symbol and cell structure. 



Multiplicity ; partial growth layers 61 



3. XSC 1-4-a. Increments for 1938, 1939, and part of 1940. Interior 



lens ; overlapping lenses 62 



4. XSC 3-1-a. Increment for 1939. Multiplicity ; lensing 62 



5. TTC 33-6-a. Increments for 1942-44. Variable number of growth 



layers on different radii 63 



6. XSC 1-3-c. Increment for 1937. Complex lensing 64 



7. YCt 2-s-a. Increment for 1940. Complex lensing; multiplicity 64 



8. XSC i-2-a. Increment for 1938. Lenses 65 



9. Types of half-lenses 68 



10. XSC i-2-a. Part of increment for 1939. Lens ; half-lens 69 



1 1. The problem of the half-lens, by diagram 70 



12. Lens grading into half-lens 71 



13. XSC i-i-b. Increments for 1938-40. Lensing 72 



14. An interpretation of fig. 13 ^2 



15. XSC i-i-b. Increment for 1940. Multiplicity; complex lensing 74 



16. An interpretation of fig. 15 74 



17. XSC i-2-b. Increment for 1938-39. Partial growth layers 75 



18. An interpretation of fig. 17 75 



19. Simple and compound arc 76 



20. SA I -a. Increments for 1933-34. Partial growth layers and intermit- 



tent densewood 78 



21. An interpretation of fig. 20 78 



22. XSC 1-3-b. Increments for 1938-39. Lenses ; multiplicity 80 



23. An interpretation of fig. 22 80 



24. XSC 10-3-a. Increment for 1939. Complex multiplicity ; lenses ; arcs . . 81 



25. TTC 36-7-b. Increments for 1939-42. Complexity of dated annual 



increments ; compound arcs 82 



26. An interpretation of fig. 25 82 



27. XSC 13-3-c. Increment for 1938. Frost effects ; lenses ; arcs 83 



28. An interpretation of fig. 27 83 



29a. Divided densewood 85 



29b. Divided lightwood 85 



30. TTC 33-1 i-a. Singly and doubly divided densewood by symbol and 



cell structure ; fading- of intra -annuals 87 



31a. Interrupted densewood 91 



31b. Interrupted lightwood 91 



32. XSC 3-1-b. Annual increment for 1935 in symbol and cell structure. 



Multiplicity ; curtain 93 



33. TTC 12-9-b. Increment for 1937. Multiplicity; arc; curtain 93 



34. Areal distribution of a partial growth layer lOo 



35. Transverse sections of fig. 34 100 



36. XSC 2-2-a. Annual increment for 1936 in symbol and cell structure. 



Multiplicity by sharp and diffuse growth layers 125 



2,7. TTC 33-13-a. Increments for 1938-42. Variable cambial and growtli 



activities 130 



