X SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I40 



Page 



38. TTAp 2-3-b. Increments for 1938-40. Variable number of contacts 



along different radii 131 



39. XSC 2-i-b. Increment for 1939. Multiplicity; compound and over- 



lapping lenses 131 



40. XSC 2-2-c. Increments for 1936-39, part of 1940. Multiplicity ; com- 



pound lens 132 



41. TTC S-ii-a. Increments for 1936-40. Multiplicity ; complex lensing. . 133 



42. Growth during 1942 on TTP 20-15 187 



43. Tip growth of Washington trees for 1944 193 



44. TTP 20-3-C. Extension of xylem into terminal bud 200 



45. Radial sequence from a tree-ring emblem 270 



46. "Fingerprint" from XSC 12-i-a. Compare with fig. 45 270 



47. XSC i2-2-a. Increments for 1938-41. "Fingerprint" pattern of 



multiplicity 271 



48. Daily rainfall for 1935 and 1938 at Texas Technological College 276 



49. Annual increase in diameter flushes and tip flushes in leader of Pinus 



taeda (Con T 1-5) 281 



50. Secondary leader of Pinus taeda (Con T 1-4) 283 



51. Annual increase in diameter flushes and tip flushes in leader of Pinus 



taeda (Con T 2-14 to 2-16, and 2-1 1) 285 



TABLES 



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I. Monthly rainfall at Texas Agricultural Experiment Substation, 



Lubbock, Tex 6 



2A. Average monthly temperatures at Lubbock, Tex., for five years . . 7 



2B. Minimum and maximum daily temperatures at Lubbock, Tex 8 



3A. Annual evaporation data at Spur, Tex 10 



3B. Monthly evaporation data at Spur, Tex 10 



3C. Annual wind movement at Spur, Tex 10 



3D. Monthly wind movement at Spur, Tex 10 



4. Descriptions of experimental trees 13 



5-44. Longitudinal transitions 102-111 



45-48. Cambial activity in branches of TTP 20-1 1 19-120 



49. Incidence of single and multiple growth layers in annual incre- 

 ments 122 



50-51. Variations of sequences along different radii 128, 129 



52-141. Variation of sequences on different sections of same branch. . . 134-182 

 142-155. Relations among branches of same tree 206-217 



156. Summary of tables 142-155 217 



157. Summary showing percentage of agreement among branches 219 



158. Average agreement among branches of trees in different species . . 220 



159. Ratio of branches with unity of annual increment to those with 



multiplicity 222 



160-173. Multiplicity in various branches 229-247 



174. Growth flushes related to years 250 



175. Average number of diameter and tip flushes per year per 



species 252 



