Drying produces a decided increase in the strength of wood, particularly in small specimens. An extreme example is the case of a completely dry spruce block 5 cm in section, which will sustain a permanent load four times as great as a green (undried) block of the same size will.
(খ) শুকিয়ে গেলে কোন ধরনের কাঠ চারগুণ বেশি ভার বহন করতে পারে?
spruce