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Beside them were trees of a peculiar kind; they were rooted in the ground, but the branches also were aerial roots, and there were no leaves. No other plants could be seen. The soil was soft, porous rock, resembling pumice. Beyond a mile or two in any direction the light merged into obscurity.
We might expect also to find a mixture of the remains of pelagic and littoral animals in the strata formed in the lagoon, for pumice and the seeds of plants are floated from distant countries into the lagoons of many atolls: on the outer coast of Keeling atoll, near the mouth of the lagoon, the case of a pelagic Pteropodous animal was brought up on the arming of the sounding lead.
Of course all he wanted to do was to get the upper hand on Rodan and Dutch, take over the camp, get the missing parts of his radio and Archer, borrow the solar tractor, and get out of here. To Serenitatis Base Serene. His only preparation was to sharpen the edges of a diamond-shaped trowel used at the diggings, with a piece of pumice. Then he waited. Opportunity came near sundown, after a shift.
When Theophilus has finished his directions, he adds: "And take great care that no further work is required." To polish the niello, he directs us to "pumice it with a damp stone, until it is made everywhere bright." There are various accounts of how Finiguerra, who was a worker in niello in Florence, discovered by its means the art of steel engraving.
There was tennis for those who liked it; racquets, polo, football, quoits, wrestling, everything apt to induce perspiration and prepare for the hour when a gong of bronze announced the opening of the baths those wonderful baths, where the Roman, his slaves about him, after passing through steam and water and the hands of the masseur, had every hair plucked from his arms, legs and armpits; his flesh rubbed down with nard, his limbs polished with pumice; and then, wrapped in a scarlet robe, lined with fur, was sent home in a litter.
Presently, you notice the stream banks crushing together, the waters tumbling, the pumice changing to granite and basalt; and you are looking over a fall sheer as a plummet, fine as mist. Follow farther down! The cañon is no longer a valley. It is a corridor between rocks so close they show only a slit of sky overhead; and to follow the stream bed, you must wade.
Each explosion being accompanied by an uncovering of the molten lava in the vent, the overhanging steam-cloud was lighted up with a grand glow for a few seconds. Some of the party, who seemed to be authorities on such matters, estimated that the vapour-column rose to a height of nearly 10,000 feet, and that fragments of pumice were shot upwards to a height of 600 feet.
Now, at Teneriffe, the black rapilli extend from the foot of the Peak to the sea-shore; while the white ashes, which are only pumice ground to powder, and among which I have discovered, with a lens, fragments of vitreous feldspar and pyroxene, exclusively occupy the region next to the Peak.
Happily, the wondrous incrusted bulk was at hand to draw my thoughts away from my hideous condition; for I verily believe, had my eye found nothing to rest upon but the honeycombed pumice, my brain would have given way.
Cliff dwellings are houses made by building up the front of a natural arch. This front wall was either in stone or sun-baked adobe. Cave dwellings are houses hollowed out of the solid rock, a feat not so difficult as it sounds when you consider the rock is only soft pumice or tufa, that yields to scraping more readily than bath brick or soft lime. The cliff dwellings are usually only one story.
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