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In one of them was a light, spiral staircase of iron, built in the centre of the room as a means of contemplating the frescos, which were said to be the work of our old friend Giotto. . . . . Finally, we climbed a long, long, narrow stair, built in the thickness of the wall, and thus gained access to the top of one of the towers, whence we saw the noblest landscapes, mountains, plains, and the Rhone, broad and bright, winding hither and thither, as if it had lost its way.
The ovolo has a convex profile, and is sometimes called a quarter-round; it is enriched with an EGG-AND-DART ornament The spiral roll may be conceived as a long cushion, whose ends are rolled under to form the VOLUTES. The part connecting the volutes is slightly hollowed, and the channel thus formed is continued into the volutes. Above the spiral roll is a low abacus, oblong or square in plan.
Then as the train passed over the fixed spiral the sound given out by the transmitter would be loudly reproduced by the telephone and indicate by its character the signal intended. One of my experiments in this direction will perhaps better illustrate my meaning. The large spiral was connected in circuit with twelve Leclanche cells and the two make and break transmitters before described.
This soon became evident; for the one last seen, descending more vertically, soon overtook the other; and both together continued to sail downward upon a spiral curve. In a few moments they had arrived within two hundred yards of the earth; and now they circled slowly around, looking down as they flew.
Jason slowly climbed the spur. To his surprise he saw a spiral of smoke ascending on the other side, just where he once used to see it, but he did not hurry, for it might be coming from a miner's cabin that had been built near the old place. On top of the spur, however, he stopped-quite stunned. That smoke was coming out of his mother's old chimney.
Before proceeding, please to bear in mind the fact that the inductive effects vary inversely as the square of the distance between the two spirals, when parallel to each other; and that the induced current in B is proportional to the number of reversals of the battery current passing through spiral A, and also to the strength of the current so passing.
A colored maid was told to look after Grace and Sylvia, and she led the way up the beautiful spiral staircase to a pleasant chamber overlooking the garden. There were two small white beds, with a little mahogany light-stand between them. On this stand stood a tall brass candlestick. There were two dressing-tables, and two small bureaus, and a number of comfortable chintz-covered chairs.
And that staircase is spiral, as steep as any ladder. Until he succeeded in realising his art Degas's tongue was the terror of artistic Paris; his solitary days, the strain on the nerves that the invention and composition of his art, so entirely new and original, entailed, wrecked his temper, and there were moments when his friends began to dread the end that his striving might bring about.
Come, my friends, to the dining saloon, and let us partake of the first of, I hope, many pleasant meals on board the Flying Fish." On reaching the head of the spiral staircase the professor paused for a moment to direct the attention of his companions to a long passage which extended apparently along the middle of the ship to the fore-end of the superstructure.
Its extremity will not leave the plane and will describe a logarithmic spiral within it. It is, in a more complicated degree, a variant of Bernouilli's 'Eadem mutata resurgo: the logarithmic conic curve becomes a logarithmic plane curve.
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