The Book of Dreams (Jack Vance novel) in the free inaugural issue as part of a contest, offering large cash prizes to anyone who can first identify any or all of the ten people in the photograph. An attractive red-haired young woman, Alice Wroke, seeks temporary employment processing the contest entries. Gersen, expecting an attempt at infiltration by Treesong, covertly uses a lie detector on her and confirms his suspicions. Eventually, each of the subjects is identified, except for one man who seems to have a variety of identities. When a contestant submits the correct identification for all ten, Gersen confronts Alice and places most of his
Detector (radio) local oscillator, hence the name. By heterodyning, the received signal is mixed (in some type of nonlinear device) with a signal from the local oscillator, to give sum and difference frequencies to the signals being mixed, just as a "first mixer" stage in a superhet would produce an intermediate frequency; the beat frequency in this case, the low frequency modulating signal is recovered and the unwanted high frequencies filtered out from the output of the product detector. Product detector circuits are and so essentially ring modulators or synchronous detectors and closely related to some phase-sensitive detector circuits. They can be