In ring-porous woods the vessels of the early wood not infrequently appear on a finished surface as darker than the denser late wood, though on cross sections of heartwood the reverse is commonly true.
It follows that in a large log the sapwood, because of the time in the life of the tree when it was grown, may be inferior in hardness, strength, and toughness to equally sound heartwood from the same log.
COLOR In species which show a distinct difference between heartwood and sapwood the natural color of heartwood is invariably darker than that of the sapwood, and very frequently the contrast is conspicuous.
Heartwood is dead wood and has almost no function in the existence of the tree other than the purely mechanical one of support.
Nest: The northern three-toed woodpecker excavates nest cavities each year in standing dead trees or in dead limbs of live trees with rotted heartwood (Jackman and Scott 1975).
Cavity formation in oaks of basal origin is a slow process, but black oak is a good cavity producer as trees approach maturity because although the heartwood decays rapidly the sapwood is resistant (Bellrose et al.
Additional tests have shown that the red heartwood of hickory is just as strong and serviceable as the white sap wood.
Many of the fungi cannot live unless they reach the heartwood of the tree.
Heartwood does not occur in all varieties of trees.
Formerly, the custom has been to throw away the heartwood as useless.
In some cases, where both heartwood and sapwood appear, it is difficult to distinguish between them as their colors are so nearly alike.
The outside wood is white and the heartwood is red or yellow.
Once larvae enter the wood they bore upward through the sapwood and into the heartwood and pupate behind a plug of excelsior-like frass.
In the advanced stage, the heartwood becomes brittle and breaks into large yellow-brown to reddish-brown cubes.
The large winding tunnels constructed by the larvae in the sapwood and heartwood of living hardwoods serve as an entrance for wood-rotting fungi and insects such as the carpenter ant.
It is estimated that defects caused by larval tunnels in the sapwood and heartwood of host trees costs the hardwood timber industry millions of dollars each year.
This decay is caused by fungi which mainly attack heartwood in the central portion of stems, branches, and roots.
The adults bore into sapwood or heartwood of logs and lumber, making pin-sized holes which are stained by the ambrosia fungus.
The larvae then enter the wood and make deep U-shaped cells through the heartwood and sapwood.
Where this strong contrast between sapwood and heartwood exists, the salesperson should know the sapwood requires more stain than the remainder of the wood.
Accurately, the black, heavy heartwood of a genus of tropical trees.
A hardwood of extreme durability, with white sapwood and a beautiful golden-yellow heartwood which on seasoning becomes dark brown, mottled with still browner streaks.
Persea Caroliniensis) having theheartwood red, found in swamps in the Southern United States.
White cedar was split into quarters by this method and then the heartwood was split away, the latter being used for canoe structural members.
A total of 50 or more ribs in five lengths, the longest about 5 feet, have been made up from white cedar heartwood and bent to the desired shape.
Heartwood reddish white, with fine, clear grain, fairly tough and elastic, not liable to warp and split.
Dry wood if soaked in water soon regains its original volume, and in the heartwood portion it may even surpass it; that is to say, swell to a larger dimension than it had when green.
The heartwood contained many knots and some checks, although it was in general of quite good quality.
Sap- and heartwood distinct, the former lighter, the latter a dull grayish brown or red.
Heartwood light red or yellow in color, sapwood narrow, nearly white, comparatively free from resins, variable annual rings.
It will be an advantage also to show not only the heartwood but the sapwood and bark.
The heartwood is usually harder and more durable than the sapwood, heavier, of better texture, and commonly of better colour.
It is very hard and solid, with black heartwood and white sapwood, and is used for furniture, turning, and small articles.
Color of the heartwood varies with different trees, yellow with some, tinged with red with others, and sometimes it might be appropriately called blue locust, for the heartwood is nearer that color than any other.
Sometimes the heartwood is no larger than a lead pencil in trunks forty or fifty years old.
Heartwood is made into canes, umbrella sticks, tool handles, rulers, and turned novelties.
The dark and variegated shades of the heartwood of some species give them their chief value as cabinet and furniture material.
The wood shows little difference in color between heartwood and sap, and bears some resemblance to buckeye.
The wood is heavy, exceedingly hard, theheartwood yellow, streaked with brown, the thin sapwood light yellow.
The wide rings of annual growth in the heartwood show fine contrast in color, and when these are developed by stains and fillers, the grain or figure of the wood is very pleasing.
The heartwood is dark or red, and is made into brush backs and parquet flooring, but the hearts are small, and no large quantity of that wood is used.
The heartwood is light brown, tinged with red, growing darker with exposure.
The color of theheartwood is light brown; the sapwood is thin; medullary rays are numerous and large; pores large; summerwood broad and dense.
The brown heartwood is light, soft, and weak, and is used little or not at all for commercial purposes.
It is heavy and hard, but weak; and theheartwood is rich dark brown tinged with red.
It is rather hard, medium strong, the heartwood light brown in color, with thick, pale sapwood.
Those who call it red elm have in mind the color of the heartwood which is of deeper red than the wood of any other elm, or they may refer to the tawny pubescence on the young shoots in winter.
The color of the heartwood is yellowish or russet brown; that of the distinct sapwood much lighter.
Around the pith comes a dark, close-grained series of rings known as the heartwood, and outside the heartwood comes a lighter layer, the sapwood.
Heartwood more deeply colored than the sapwood but without distinct boundary line.
The heartwood is generally heavier and of deeper color than the sapwood.
Heartwood is darker than the sapwood, sometimes only slightly, but in other instances it may vary from a light-brown color to jet black.
Veneers of the heartwood are largely used in furniture, sometimes as imitation mahogany or Circassian walnut.
The wood is hard, dense, heavy, strong, the heartwood brown or black, the wide sapwood white or yellowish.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "heartwood" in a variety of sentences. We hope that you will now be able to make sentences using this word.