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| | Wood - the free encyclopedia (Site not responding. Last check: 2007-10-03) |
 | | Thinsapwood is characteristic of such trees as chestnut, fl locust, mulberry, osage-orange, and sassafras, while in maple, ash, hickory, hackberry, beech,and pine, thick sapwood is the rule. |
 | | In ring-porous species, such as ash, fl locust, catalpa, chestnut, elm, hickory, mulberry, and oak, thelarger vessels or pores (as cross sections of vessels are called) are localized in the part of the growth ring formed in spring,thus forming a region of more or less open and porous tissue. |
 | | The rest of the ring, produced in summer, is made up of smallervessels and a much greater proportion of wood fibres. |
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