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When the seismograph has been arranged according to such directions, no matter from what part the first horizontal shock comes, one of the four pendulums will be set in motion.
"This is an improved seismograph," he explained, "one after a very recent model by Prince Galitzin of the Imperial Academy of St. Petersburg. The seismograph, as you know, was devised to register earthquakes at a distance. This one not only measures the size of a distant earthquake, but the actual direction from which the earth-tremors come. That is why there are two pendulums and two drums.
The seismograph of to-day, however, has reached a stage of perfection where close approximations are obtained in the records made. Vesuvius Devastates the Region of Naples. We have in other chapters described the terrible work of Mount Vesuvius in the past, from the far-off era of the destruction of Pompeii down to the end of the last century.
But Gibbie read some trouble in her eyes, for his soul was all touch, and, like a delicate spiritual seismograph, responded at once to the least tremble of a neighbouring soul. The minister was not present, and Mrs. Sclater had both to be the blazing coal, and keep blowing herself, else, however hot it might be at the smouldering hearth, the little company would have sent up no flame of talk.
The velocity of the falling object, as reported from two radar installations, checked against a seismograph record of the time of the impact in the lake and allowed no leeway of time for it to hover in mid-air to be admired. But there were enough detailed and first-hand accounts of alarming events to make a second statement by the Defense Department necessary.
Do you want somebody to count the empty cigarette boxes lying around every morning?" Lay it to the long idle afternoon, to the new environment, to anything you like, but I began to think that perhaps I did. I was confoundedly lonely. For the first time in my life its even course began to waver: the needle registered warning marks on the matrimonial seismograph, lines vague enough, but lines.
The vibrations did not entirely cease until 12.35 P. M., during this period there having been nearly half an inch of to and fro motion in the surface of the earth. From far away New Zealand, on the same date, the government seismograph at the capital, Wellington, recorded seismic waves that apparently passed round the earth five times at intervals of about four hours each.
He had found Magdaléna the most comfortable of companions, she had presented him with two fine boys who were preparing for college, at present and a lovely daughter; and he was, in a leisurely way, collecting earthquake data, for future publication, and amused himself with a seismograph; which worried Magdaléna, who thought the instrument much too intimate with earthquakes to be a safe piece of household furniture.
He followed to the small, far-spaced hut now snow-buried to its eaves in which the seismograph ticked away to itself. "I think I'm going crazy," said the geophysics man. "Did you ever hear of a ground-shock starting inside out?" He pointed to the graph-paper that fed very, very slowly past the seismograph's pens. The recording did look odd.
His being, corporeal and spiritual, seemed, to the ceaseless vibrations of the great globe, a very seismograph. Often would he make his sign to Kob to lay his ear on the ground and listen, when no indication had reached the latter. I suspect the exceptional development in him of some sense rudimentary in us all. He had the keenest eyes in Glenruadh, and was a dead shot.
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