Friction resists the motion of one surface upon another, but it may and frequently does confer the motion of the one upon the other, and in this way causes, instead of resists, the motion of the latter.
Among the many varieties of trees and plants found are the date palm, mimosa, wild olive, giant sycamores, junipers and laurels, the myrrh and other gum trees (gnarled and stunted, these flourish most on the eastern foothills), a magnificent pine (the Natal yellow pine, which resists the attacks of the white ant), the fig, orange, lime, pomegranate, peach, apricot, banana and other fruit trees; the grape vine (rare), blackberry and raspberry; the cotton and indigo plants, and occasionally the sugar cane.
Palm which resists the action of the water for several years.
The trunks make good piles for wharves, &c., as the wood resists the attacks of borers; the leaves are used for thatching.
When the wing descends as shown at p', the air (fulcrum f) resists its downward passage, and forces the body (b) or its representative (w') slightly upwards.