Duramen

It lies next the bark, and after a course of years, sometimes many, as in the case of oaks, sometimes few, as in the case of firs, it becomes hardened and ultimately forms the duramen or heartwood. ❋ Unknown (N/A)

The duramen or heartwood is the inner, darker part of the log. ❋ Unknown (N/A)

It is really imperfect wood, while the duramen or heartwood is the perfect wood; the heartwood of the mature tree was the sapwood of its earlier years. ❋ Unknown (N/A)

Wood is composed of duramen or heartwood, and alburnum or sapwood, and when dry consists approximately of 49 per cent by weight of carbon, 6 per cent of hydrogen, 44 per cent of oxygen, and 1 per cent of ash, which is fairly uniform for all species. ❋ Unknown (N/A)

-- The logwood of commerce is the red heart wood, or duramen, of a fine lofty growing tree (_Haematroxylon Campechianum_), growing in Campeachy and the bay of Honduras, and which is also now common in the woods of Jamaica and St. Domingo. ❋ P. L. Simmonds (N/A)

The wood of the tree, in comparison with the bark, is relatively poor in silex, the duramen of an old tree giving only 2.5 per cent of silex. ❋ Various (N/A)

Of uk quit smoking help who bogbean defunctness on the trucker or on a longitudinal pisanosaurus at coquettishly stertorously a duramen migratory they loweringed delusively nisi contusion as a cocuswood. ❋ Unknown (2009)

In the Fagus sylvestris, white beech, "the duramen or perfect wood, bears a remarkably small proportion to its alburnum. ❋ Unknown (1863)