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If I take anything that confines the air properly, as this membrane, which also is able to contract and expand so as to give us a measure of the elasticity of the air, and confine in this bladder a certain portion of air; and then, if we take the atmosphere off from the outside of it, just as in these cases we put the pressure on if we take the pressure off, you will see how it will then go on expanding and expanding, larger and larger, until it will fill the whole of this bell-jar, shewing you that wonderful property of the air, its elasticity, its compressibility, and expansibility, to an exceedingly large extent, and which is very essential for the purposes and services it performs in the economy of creation.
Now, phosphoric acid melts in water just as sugar does, and in a few minutes these fumes will disappear. They are beginning to melt already, and the water from the pan is rising up in the bell-jar. Why is this? Consider for a moment what we have done.
Once, the Great Peacock, apprised by the magic effluvia, used to come from miles around to visit the recluse in her bell-jar in my study. The dwarf of this evening, that other nocturnal pilgrim, crosses the intricate tangle of the branches without a mistake and makes straight for the rope-walker. He has as his guide the infallible compass that brings every Jack and his Jill together.
After taking a turn round the top of the bell-jar, the robber of the dead returns to her prey and squeezes it, licking its mouth until the last trace of honey has disappeared. This frenzied passion of the Philanthus for the Bee's syrup is declared in yet another fashion.
It only remained to transmute fire that the transmutation of the four elements might be completed. Experiment. A piece of red-hot iron is placed in a bell-jar, filled with water, held over a basin containing water; the volume of the water decreases, and the air in the bell-jar takes fire when a lighted taper is brought into it. Conclusion. Water is changed into fire. Experiment.
An interesting experiment bearing on this has been described lately by Prof. Marangoni. The upper half of a thin Leyden jar charged is brought into the bell-jar, and held there four or five seconds; it is then found entirely discharged. C., before inserting in the bell-jar, a different effect will be had; the Leyden jar will give out long sparks after withdrawal.
Sylvanus P. Thompson in the year 1881, referring to the Faure storage batteries then in use, "probably bears as much resemblance to the future accumulator as a glass bell-jar used in chemical experiments for holding gas does to the gasometer of a city gasworks, or James Watt's first model steam-engine does to the engines of an Atlantic steamer."
It's all over." There was a tinkling sound, as fragments of the broken test tube, the bell-jar and other things began falling about the room. Mark was fumbling at the door of the laboratory, seeking to escape. "Come on back," said Jack. "It's all over. There's no more danger. We'll try it again."
"And it did blow up!" cried Mark, still rubbing his head. "The test tube, and the other tube, and the rubber hose, and the bell-jar. I told you it would, Jack." "Then you weren't disappointed," retorted Jack, this time with a broad smile. "I don't like to disappoint people," he added. "What kind of gas was it, Darrow?" asked Professor Lenton.
In one corner of the room stood a closed cabinet organ; behind me, a tall base-burner, polished till it seemed to light the dimmest corners of the room. There was no fire in the stove; there was no air in the room, only the mingled breath of soot and the hair-flowers and the plush album and the stuffed blue jay under the bell-jar on the mantelpiece, and the heavy brass-clasped Bible.
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