Hard and Soft Woods
There is a strong relationship between the properties of wood and the properties of the particular tree that yielded it. The density of wood varies with species. The density of a wood correlates with its strength (mechanical properties). For example, mahogany is a medium-dense hardwood that is excellent for fine furniture crafting, whereas balsa is light, making it useful for model building. One of the densest woods is black ironwood.
It is common to classify wood as either softwood or hardwood. The wood from conifers (e.g. pine) is called softwood, and the wood from dicotyledons (usually broad-leaved trees, e.g. oak) is called hardwood. These names are a bit misleading, as hardwoods are not necessarily hard, and softwoods are not necessarily soft. The well-known balsa (a hardwood) is actually softer than any commercial softwood. Conversely, some softwoods (e.g. yew) are harder than many hardwoods.
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Famous quotes containing the words hard and, hard, soft and/or woods:
“Stupidity is something unshakable; nothing attacks it without breaking itself against it; it is of the nature of granite, hard and resistant.”
—Gustave Flaubert (1821–1880)
“If we would enjoy the most intimate society with that in each of us which is without, or above, being spoken to, we must not only be silent, but commonly so far apart bodily that we cannot possibly hear each other’s voice in any case. Referred to this standard, speech is for the convenience of those who are hard of hearing; but there are many fine things which we cannot say if we have to shout.”
—Henry David Thoreau (1817–1862)
“To rest, the cushion and soft dean invite,
Who never mentions hell to ears polite.”
—Alexander Pope (1688–1744)
“It is remarkable with what pure satisfaction the traveler in these woods will reach his camping-ground on the eve of a tempestuous night like this, as if he had got to his inn, and, rolling himself in his blanket, stretch himself on his six-feet-by-two bed of dripping fir twigs, with a thin sheet of cotton for roof, snug as a meadow-mouse in its nest.”
—Henry David Thoreau (1817–1862)