Chains require pulleys or drums, grooved, notched and toothed, so as to fit the links of the chain.
Obtusiloba, the post oak of the backwoodsman, a smaller tree with rough leaves and notched upper lobes, produces an abundance of acorns and good timber, said to be more durable than that of the white oak.
The flowers are mostly heavy and drooping, petals brightly coloured, the edges being curiously notched and waved.
The more typical members of the genus are terrestrial in their habits, and their cheek-teeth have nearly the same pattern as in rhinoceroses; while the interval between the upper incisors is less than the width of the teeth; and the lower incisors are only slightly notched at the cutting edge.
The saw is first found as a notched bronze knife of the IHrd Dynasty.