THE PERIODICITY AND DISTRIBUTION OF RADIAL 



GROWTH IN TREES AND THEIR RELATION 



TO THE DEVELOPMENT OF 



"ANNUAL" RINGS. 



J. G. GROSSENBACHER. 



REPRINTED FROM THE TRANSACTIONS OF THE WISCONSIN ACADEMY OF 

 SCIENCES, ARTS, AND LETTERS, VOL. XVIII, PART I. 



Issued October, 1915. 



LIBRARY 



FACULTY OF F r 

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