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Updated: October 5, 2025
The Emperor Augustus remained unmoved and imperial with an air-pump thrust into one eye. Portraits of French sheriffs and Dutch burgomasters, phlegmatic now as when in life, looked down pallid and unconcerned on the chaos of past ages below them. Every land of earth seemed to have contributed some stray fragment of its learning, some example of its art.
As the air-pump ceased for short intervals, and absolute silence reigned around, a clang, unlike any sounds of earth, came upon the ear "As if the ocean's heart were stirred With inward life, a sound is heard." It was a signal from those in the bell; it seemed as if the sea trembled, and old Ocean spoke from the deeper recesses of his soul.
It rose over Baldwin's knees, waist, and head, and, finally, rushed out at the manhole, deluging Rooney's legs. Our diver was now fairly imprisoned; an accident, however trifling in itself, that should stop the air-pump would have been his death-knell.
The apothecary's apprentice received it with great exultation, and forthwith employed it as a part of a pneumatic apparatus which he contrived, afterward using it to perform the duties of an air-pump in one of his experiments on the nature and sources of heat.
The air-pump about this period was given to the world, and chemists were already busy investigating the nature of gases. Cavallo was experimenting on kindred lines, while in our own land the rival geniuses of Priestley and Cavendish were clearing the way to make with respect to the atmosphere the most important discovery yet dreamed of.
In the dark, and by way of vacant lots and unlighted streets, he took them to a certain point where an engine had just backed a single, unlighted day coach on to a siding and stood there with air-pump wheezing and the engineer crawling around beneath with his oil can. By the rear steps of the coach a mystified conductor stood waiting with his lantern hidden under his coat.
This was a bright light, whereas the barometer light was only a glow. Pondering over this, Hauksbee tried various experiments, revolving pieces of amber, flint, steel, and other substances in his exhausted air-pump receiver, with negative, or unsatisfactory, results. Finally, it occurred to him to revolve an exhausted glass tube itself.
This may be said of Boyle, that his writings profoundly modified scientific opinion, and his name will always stand in the forefront amongst those of chemists. He made important improvements in the air-pump, was one of the earliest Fellows of the Royal Society, and founded the "Boyle Lectures." He died in 1691.
Something must have happened to her air-pump above the water. She was not faint from any other cause, but was getting an insufficient supply of fresh air. At this moment Madge proved her mettle. She remembered Captain Jules's injunction, "Keep a clear head under the water and there is nothing to fear." She knew the signal for more fresh air, and gave two hard, quick pulls on her life line.
This pendulum, as you see, is so delicately poised that it will instantly respond to the slightest deviation from a horizontal position, and, swaying over one of these needle-points, will send an electric current to the air-pump, causing it to promptly inject a sufficient quantity of air into the proper chamber to restore the equilibrium.
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