Stoii Analyses. l6i 



at the same time more comprehensible to the mind of the average 

 student of forest mensuration. 



First, as to the methods of tabulating the measurements taken 

 in the field. Figure i (page 162) shows a revised form filled in 

 with data from a White Pine, in which the usual measurements 

 are recorded, together with a few additional ones which will ren- 

 der the computations in the office less liable to error. For con- 

 venience, the spaces in which the measurements are recorded are 

 both named and lettered, to correspond with the following list; 

 and in the discussion which follows the several columns will be 

 referred to by letter. 



(a) The number of the section; the stump being considered 



No. I, the top of the first log section No. 2, etc. 



(b) The age of the section, i. e., the age up to that section, 



and the number of annual rings on that section. 



(c) The length of the section, expressed in feet and tenths. 



(d) The diameter, outside bark, of each section, in inches' and 



tenths. 



(e) The diameter, inside bark, of each section, in inches and 



tenths. 



(f) The width of the bark at each section. 



(g) The width of the sapwood at each section. 



(h) The average diameter of the several sections, by decades, 

 as explained in the following paragraphs. 



(j) The diameter, breast-high. 



(k) The total age, obtained as explained in the following para- 

 graphs. 



(1) Clear length. 



(m) Used length. 



(n) Merchantable length. 



