... gymnosperms, Pinus sylvestris L. (Ps),Pinus pinaster Ait. (Pp), Pinus insignis Dougl. (Pi); 4 angiosperms, Pop-ulus spp. (pop); Quercus pyrenaica Willd. (Qp); Entandrophragmacylindricum Sprague (Ec); ... give the swelling strains in radial and tan-gential directions, respectively, calculated using equation ( 2), forboth non-aged and aged wood. In all cases, the swelling of aged wood induced by ... However, in the ranges of high humidity thereis a greater spread of the values obtained, with the differentia-tion of Pinus Pinaster once again standing out.3.2. Swelling strainTables III and...