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
Infrared open-path detector gases) have a suitable absorption spectrum, the wavelengths must lie within a spectral window so the air in the beam path is itself transparent. These wavelength regions have been used: The first open-path detector offered for routine industrial use, as distinct from research instruments built in small numbers, was the Wright and Wright 'Pathwatch' in the US, 1983. Acquired by Det-tronics in 1992, the detector operated in the 3.4 μm region with a powerful incandescent source and a mechanical chopper. It did not achieved large volume sales, mainly because of cost and doubts about long-term reliability with moving parts. Beginning