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As soon as the piece begins to detach itself from the mould the air enters the apparatus, and the pressure gauge connected with the air pump begins to lower. It is then necessary, without a moment's loss of time, to remove the screw press, the disk, and the upper part of the mould itself, in order to facilitate as much as possible the contraction of the piece.
Accompanying this, and apparently descending from the ceiling, a soft light of aromatic odor diffused itself through the apartment. This was followed by the appearance of a shining disk of amber and pearl, revolving rapidly in its descent till it reached the congregated party.
A sufficient handle was made with a split stick. When the cooking was done, the handle was thrown away, and the half canteen slipped out of the road into the haversack. There seemed to be no end of the uses to which this ever-ready disk of blackened sheet iron could be turned.
The moon, whose dull broad disk had risen among the evening mists arrayed in gloomy red, had now topped the highest of the exhalations of earth, and beamed in the wide heaven, adorned once more in her pale, accustomed hue.
Let r represent the silvered surface of the glass disk, b, the immersion objective, f, the thin glass cover. It will be easily seen that the ray of light, h, from the mirror or condenser above the stage will enter the slide and thence be refracted to the silvered surface of the illuminator, r, whence it is reflected at a corresponding angle to the object in the focus of the objective.
Till that moment, absorbed in the terrible work they were about, neither the rank and file nor the leaders had noticed the gradual progress of the dark semicircle over the sun's disk. The ominous shadow fell upon them, still more awful from its suddenness. A great horror seized the serried hosts.
On this was printed a picture of a pretty girl, holding a striped parasol, the colors of which could be changed by means of a revolving disk in the back, which showed red, yellow, green, and blue through little interstices made in the ground occupied by the umbrella top. "Isn't that clever?" he said, handing it to her and showing her how it worked. "You never saw anything like that before."
Glancing upward, I saw the aperture, a small blue disk, in which a star was visible, while little Weena's head showed as a round black projection. The thudding sound of a machine below grew louder and more oppressive. Everything save that little disk above was profoundly dark, and when I looked up again Weena had disappeared. 'I was in an agony of discomfort.
A disk like a sealing-wax wafer indicated the position of the sun. The heat was terrific. The dynamiting was incessant, but it did not drown the roar and the eager furious crackle of the flames, the reverberating crash of falling walls. And the flames were the redder for the blackness above. Cinders were falling all over the heights, and the smoke burned the eyes.
The white disk presented a bluish-green tint at the depth of from nine to twelve meters; at about fifteen meters it assumed a greenish-blue hue, and the blue element increased in distinctness with augmenting depth, until the disk became invisible or undistinguishable in the surrounding mass of blue waters.
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