VI SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I4O 



Page 



VI, Multiplicity of growth layers 121 



Incidence of the single annual 121 



Statement of the problem 123 



Types of growth layers involved 125 



Absolute dating and the detection of multiplicity 126 



Details of multiplicity 127 



Variation of sequences along different radii of a section 127 



Variation of sequences on different sections of the same 



branch 133 



Relation of diameter flushes to tip flushes 183 



Relations among branches of the same tree 205 



Relations among trees of the same species 223 



Relations among different species 225 



Extremes of multiplicity 225 



Interrelationships 253 



Causes 253 



Multiplicity and chronology 266 



Multiplicity and the forest border 274 



Multiplicity and rainfall interpretations 277 



Multiplicity and cycle interpretations 278 



VII. Extension of multiplicity into the trunk 279 



VIII. Summary 286 



Discovery of absolute dating 286 



Trees, localities, and environments a86 



Methods 286 



Dating criteria 287 



Qassification 287 



Multiplicity 288 



IX. Conclusions 288 



References 291 



