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Bud, who was familiar with ion propulsion for spaceships, wrinkled his brow in a puzzled frown. "A goofy idea just occurred to me, but I think it may work out," Tom replied. He seized a pencil and began explaining what he had in mind. The drive unit would take water into itself, separate the ionized molecules, and expose them to an electric field. Thus a stream of water would be forced out.
This movement, faithful to the laws of mechanics, would have been accelerated by the diminution of volume, and a time would have come when the centrifugal force would have overpowered the centripetal, which causes the molecules all to tend towards the centre.
"You'd better explain that, father," said Beth, when we reached this point in our summary that evening. "Heat is the vibration of molecules of matter," the professor began. I nodded. "Make it clear when you write it up, Bob," Alan put in. "It's like this. All molecules are in motion the faster the motion, the hotter the substance, and vice versa."
Is it, as some of the older naturalists supposed, diffused throughout the universe in molecules, which are indestructible and unchangeable in themselves; but, in endless transmigration, unite in innumerable permutations, into the diversified forms of life we know? Or, is the matter of life composed of ordinary matter, differing from it only in the manner in which its atoms are aggregated?
The amount of air per unit volume will have been doubled, the weight will have been doubled, the amount of matter as determined by its weight will have been doubled, and consequently we say its density has been doubled. If a bullet or a piece of iron be hammered, the molecules are compacted closer together, and a greater number can be got into a cubic inch when so condensed.
The molecules of matter, in one combination, may as well exhibit the phenomena of life, as in other combinations, any other kind of phenomena. The distinguished Sir William Thomson cannot trust himself to that bridge. "Dead matter," he says, "cannot become living matter without coming under the influence of matter previously alive.
Ultimately, of course, they denote the things of our common sense acquaintance. But immediately they do not designate them in their common context, but translated into terms of scientific inquiry. Atoms, molecules, chemical formulae, the mathematical propositions in the study of physics all these have primarily an intellectual value and only indirectly an empirical value.
In the case of the Great Pyramid, the object is the perceived unit entity which as perceived remains self-identical throughout the ages; while the whole dance of molecules and the shifting play of the electromagnetic field are ingredients of the event. An object is in a sense out of time.
All the small, sordid details of which lives lived in society, lives such as hers, are full, details which assume often an extraordinary importance, a significance like that of molecules seen through a magnifying glass, had suddenly become to her as nothing. A profound indifference had softly invaded her towards the petty side of life.
Likewise, the electric currents produced by cold packs, ablutions and other cold-water applications split up the molecules of water in the tissues of the body into their component parts. In this way large amounts of oxygen and ozone are liberated, and these elements assist to a considerable extent in the oxidation and neutralization of waste materials and disease products.
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