%0 Article
%T Auxiliary observations on the measurement of the cross-sectional area of aspen logs
%A Kärkkäinen, Matti
%D 1976
%J Silva Fennica
%V 10
%N 4
%R doi:10.14214/sf.a14796
%U https://silvafennica.fi/article/4950
%X <p>In this study the area, 8 diameters, and 16 radii were measured of 174 discs representing aspen logs in a mill. The average difference between the largest and smallest diameter was 18 mm, or 7% of the longest diameter. The difference between the largest and smallest radius was 29 mm, or 22% of the longest radius. The diameter was on the average 2.4 mm longer than the two corresponding radii.</p>
<p>The exact area of each disc was measured using a planimeter. In comparison, the area based on the circle formula the diameter being the arithmetic mean of largest and smallest diameters overestimated the area by 1.7%. The results also indicated that the use of random direction in the measurement of diameter overestimated the cross-sectional area on the average by 1.8%.</p>
<p>The study is continuation of the earlier study where the bibliography is presented. As far as the results are comparable, they support each other.</p>
<p>The PDF includes a summary in English. </p>