
"Once here—and I don't pretend to know how it got across—it was stable still and I suggest that this was because it
carried the laws of its own Universe with it. The fact that it slowly became radioactive and? then ever more radioactive
may mean that the laws of our own Universe slowly soaked into its substance, if you know what I mean.
"I point out that at the same time that the plutonium-186 appeared, a sample of tungsten, made up of several stable
isotopes, including tungsten-186, disappeared. It may have slipped over into the parallel Universe. After all, it is logical t
suppose that it is simpler for an exchange of mass to take place than for a one-way transfer to do so. In the parallel
Universe, tungsten-186 may be as anomalous as plutonium-186 is here. It may begin as a stable substance and slowly
become increasingly radioactive. It may serve as an energy source there just as plutonium-186 would here."
The audience must have been listening with considerable astonishment for there is no record of interruption, at least
until the sentence last recorded above, at which time Hallam seemed to have paused to catch his breath and perhaps to
wonder at his own temerity.
Someone from the audience (presumably Antoine-Jerome Lapin, though the record is not clear) asked if Professor
Hallam were suggesting that an intelligent agent in the para-Universe had deliberately made the exchange in order to
obtain an energy source. The expression "para-Universe," inspired apparently as an abbreviation of "parallel-Universe,"
thus entered the language. This question contained the first recorded use of the expression.
There was a pause and then Hallam, more daring than ever, said—and this was the nub of the Great Insight— "Yes, I
think so, and I think that the energy source cannot be made practical unless Universe and para-Universe work together,
each at one half of a pump, pushing energy from them to us and from us to them, taking advantage of the difference in t
natural laws of the two Universes."
Hallam had adopted the word "para-Universe" and made it his own at this point. Furthermore, he became the first to us
the word "pump" (since invariably capitalized) in connection with the matter.
There is a tendency in the official account to give the impression that Hallam's suggestion caught fire at once, but it di
not. Those who were willing to discuss it at all would commit themselves no farther than to say it was an amusing
speculation. Kantrowitsch, in particular, did not say a word. This was crucial to Hallam's career.
Hallam could scarcely carry through the theoretical and practical implications of his own suggestion all by himself,
team was required and it was built up. But none of the team, until it was too late, would associate himself openly with t
suggestion. By the time success was unmistakable, the public had grown to think of it as Hallam's and Hallam's alone. I
was Hallam, to all the world, and Hallam alone, who had first discovered the substance, who had conceived and
transmitted the Great Insight; and it was therefore Hallam who was the Father of the Electron Pump.
Thus, in various laboratories, pellets of tungsten metal were laid out temptingly. In one out of ten the transfer was ma
and new supplies of plutonium-186 were produced. Other elements were offered as bait and refused. . . . But wherever th
plutonium-186 appeared and whoever it was that brought the supply to the central research organization working on the
problem, to the public it was an additional quantity of "Hallam's-tungsten."
It was Hallam again who presented some aspects of the theory to the public most successfully. To his own surpris
(as he later said) he found himself to be a facile writer, and he enjoyed popularizing. Besides success has its own
inertia, and the public would accept information on the project from no one but Hallam.
In a since famous article in the North American Sunday Tele-Times Weekly, he wrote, "We cannot say in how man
different ways the laws of the para-Universe differ from our own, but we can guess with some assurance that the
strong nuclear interaction, which is the strongest known force in our Universe, is even stronger in the para-Univers
perhaps a hundred times stronger. This means that protons are more easily held together against their own
electrostatic attraction and that a nucleus requires fewer neutrons to produce stability.
"Plutonium-186, stable in their Universe, contains far too many protons, or too few neutrons, to be stable in ours
with its less effective nuclear interaction. The plutonium-186, once in our Universe, begins to radiate positrons,
releasing energy as it does so, and with each positron emitted, a proton within a nucleus is converted to a neutron.
Eventually, twenty protons per nucleus have been converted to neutrons and plutonium-186 has become
tungsten-186, which is stable by the laws of our own Universe. In the process, twenty positrons per nucleus have
been eliminated. These meet, combine with, and annihilate twenty electrons, releasing further energy, so that for