round timber the solid volume (i.e., the total wood content) of a stem or log in cubic units, obtained by multiplying length by cross-sectional area(s), the latter being located or weighted according to stem shape —note 1. the sectional area is commonly taken at midlength (Huber's method) or as the mean of the two end-sections (Smalian's method), using the formula π/4 or g²/4π where d = diameter and g = girth —note 2. true volume measure is widely used in Europe and Asia, and for statistical research This definition last updated 10/29/2008