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Watching the pyrometers which recorded the temperature of the outer shell, he drove the lifeboat ahead at the highest safe atmospheric speed while Bradley went to inspect the damage. "Pretty bad, but better than I thought," the captain reported. "Outer and inner plates broken away on a seam. Inter-wall vacuum all lost, and we wouldn't hold carpet-rags, let alone air. Any tools aboard?"
Another class of pyrometers having great promise in the future is based on what may be called the "water-current" principle. Here the temperature is determined by noting the amount of heat communicated to a known current of water circulating in the medium to be observed. The idea, which was due to M. De Saintignon, has been carried out in its most improved form by M. Boulier.
"We have this arranged so that all the furnaces are filled in the morning, when they are cold, and there are pyrometers to tell when the right heat is reached. All the ovens, you see, are managed by these switches near the door. Look here "
The bars glowed more fiercely as they were advanced to full working load the stranger was one blaze of incandescent ionization, but she still fought on; and Seaton noticed that the pyrometers recording the temperature of the shell were mounting rapidly, in spite of the refrigerators. "Dunark, put everything you've got upon one spot right on the end of his nose!"
This invention was speedily followed by a lot of others, water-wheels, curious doorlocks and latches, thermometers, hygrometers, pyrometers, clocks, a barometer, an automatic contrivance for feeding the horses at any required hour, a lamp-lighter and fire-lighter, an early-or-late-rising machine, and so forth.
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