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It is also apparent that yew grown at high altitudes, over three thousand feet, is superior to lowland yew. In selecting a tree for a hunting bow, the stave must be at least six feet long, free from limbs, knots, twists, pitch pockets, rot, small sprouting twigs and corrugations.

As the submerged bow raised to a level with the stern, he noticed that the small blades on the horizontal vanes dropped from their upward slant to a straight line with the vanes. "Rudders," he said, "horizontal rudders. Can't be anything else." With his chin in his hand and his wrinkled brow creased with deeper corrugations, he put his mind through a process of inductive reasoning.

The majority are parts of large open-mouth jars with flaring rims, corrugated or often indented with the thumb-nail or some hard substance, the coil becoming obscure on the lower surface. The inside of these jars is smooth, but never polished, and in one instance the potter used the corrugations of the coil as an ornamental motive.

It is evident that this bay, and the larger part of the "Sea of Nectar," have been created by an outwelling of liquid lavas, which formed a smooth floor over a portion of the pre-existing surface of the moon, and broke down and submerged a large part of the mountain ring of Fracastorius, leaving the more ancient walls standing at the southern end, while, outlined by depressions and corrugations in the rocky blanket, are certain half-defined forms belonging to the buried world beneath.

In another curious passage he says that all things which are natural and congruent with the causes which produce them have a certain beauty and attractiveness of their own; for instance, the splittings and corrugations on the surface of bread when it has been baked.

The troughs and waves seem to be corrugations in the surface of greater undulations; for during a day's march or so, on reaching the top of one ridge, our view forwards was limited to the next ridge, until a certain point was reached, from which we could see in either direction; and from this point onwards the ridges sank before us for a nearly equal distance, and then again they rose, each ridge higher than the last.

Came a straggling volley again, like a man running a metal hammer very rapidly along iron corrugations, and this time people were dropping all over the road. One white-faced man not a score of yards away fell with a curse and a sob, struggled up, staggered for some yards with blood running abundantly from his neck, and fell and never stirred again.

This marble is a calcareous formation deposited from the waters of hot springs, usually in volcanic regions, and is common in the hills about Rome. It often contains the moulds left by leaves and other materials incorporated in the deposit. These account for the corrugations of the stone when it is cut. In California, as in other regions where hot springs are found, travertine is not uncommon.

It continued for two hours with short sighs, corrugations of small foreheads, the complaining cries and scratchings of slate pencils over slates, and other signs of minor anguish among the more youthful of the flock; and with more or less whisperings, movements of the lips, and unconscious soliloquy among the older pupils.

Each shaking-table of the pulsators is made of corrugated iron plates in several sections with a drop of about an inch from one division to another. A sufficient quantity of thick grease is spread over the plates to cover them to the top of the corrugations. The concentrates are continuously spread over the upper portion of the table automatically while running water washes them down.