1915] BROWN—PINUS STROBUS 239 
15. White pine has long roots and short roots. Only the first 
elongate to any extent and often are in symbiosis with mycorhiza. 
Growth in length begins during the last half of April, in some cases 
even earlier; no reliable data were obtained regarding its cessation. 
Secondary growth occurs during the first season and proceeds 
in the usual way. 
This work was undertaken at the suggestion of Professor W. W. 
Row Lee, Cornell University, to whom I am very grateful for 
help and criticism. Acknowledgments are also due to Professor 
WALTER MuLrorD and Professor JoHN R. BENTLEY of the De- 
partment of Forestry, New York State College of Agriculture, 
Ithaca, N.Y 
SYRACUSE UNIVERSITY 
SyRAcusE, N.Y. 
LITERATURE CITED 
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Mitth. Forstl. Versuchs. Oesterr. 22:pp. 160. 1897. 
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: Ein Ringelungsversuch. Allg. Forst- und Jagd-Zeit. 1889. 
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