78 Forestry Quarterly. 



is at present densely wooded and inhabited only by light-house 

 keepers and employees of the company it is destined to become a 

 resort of as much importance to the people of Chicago and other 

 cities as the Adirondacks are to New York. He will have charge 

 of the general forestry work, fish and game preservation, road 

 construction and other works which will add to the value and at- 

 tractions of the island. 



STUMP ANALYSIS. 



A practice of doubtful utility which has recently been noticed 

 in forest investigations under a term conve3dng an entirely errone- 

 ous impression is " stump analysis." * Compared with stem anal- 

 ysis, to which it would seem related, this process of ascertain- 

 ing accretion on weathered stumps is entirely worthless. To be 

 sure diameter and area accretion curves of single trees may be so 

 obtained, but as these measurements are necessarily taken at 

 varying heights, the heights of the stumps, the}' cannot be readily 

 compared iiiter se and will not furnish curves for the stand. 



But especially are the curves so obtained of little value as the 

 data come from the very part of the tree least fitted for use as rep- 

 resentative, for here irregularities due to accidental injuries — 

 .shading, etc. — as well as to normal root-swelling and fluting are 

 most pronounced. These irregularities have been carefully worked 

 out for the White Pine and very instructive comparisons of curves 

 derived from the stump section (2V2 ft. from ground) with curves 

 from higher sections are made in the monograph on the White 

 Pine.^ Stumps may be of great value to the crui.ser as indices of 

 soundness, etc., for estimating adjacent stands, but plans for the 

 future must rest on a firmer basis than such data can ever furnish. 



'Duncan, T. \,. Report on the Forest Conditions of the Pillsbury Dona- 

 tion. Pp. 23. Maps, Plates. St. Paul, Minn., 1902. 



Hawes, A. F. A Plantation of European Larch. P'orestry and Irrigation. 

 Vol. VIII, Pp. 472. (Nov. 1902.) 



'The White Pine. By V. M. Spaulding ; revised and enlarged by B. E. 

 Fernow. (Bull. No. 22. Div. of Forestry. ) Washington, 1899. 



See Appendix, Table V, Pp. 107-116. 



