W.E.M. Further references: ORAL HISTORY; Lors Karden, Truth and Fancy in the Oral History (Yoiba Rose); Lore Karden, Fact and Fiction in the Official History (Yorba: Rose). OIL LENS. Force-field-enclosed hufuf oil, used principally in telescopes. Oil lenses- so accurate that they have yet to be surpassed, eight millennia after their invention-share with many other enduring pieces of technology an elegant simplicity. Each lens is made up of a layer of hufuf oil (varying in thickness from .5 mm to 1.0 mm) held in static tension by an enclosing force field, and is placed within a viewing tube as part of a magnifying or other light-manipulative system. Because of the extremely responsive nature of the enclosing force field, the oil layer can by adjusted within microns of a desired setting. No other type of lens element approaches such accuracy, hi 7687, Marcus Vander, an Ixian Field Technician (Class Three) was experimenting with the effects of various force fields on compressed fluids. He had chosen hufuf oil (a derivative of the hufuf plant, a native growth of Eca? noted chiefly for its oil-filled seedpods) because of its viscosity and near-perfect transparency. Vander wished to develop some means of transporting liquids using a force field as a container, an invention which would undoubtedly have had a wide array of useful applications. What he had actually created- as he discovered when the suspended oil focused a beam of white light onto his lab counter and melted its finish-was the first oil lens. The new lenses had completely replaced all older, less accurate types within fifteen years of their entry into the marketplace. Their supremacy was threatened only once, in 8176, when a poor harvest of hufuf pods created a shortage of oil. Fortunately, the season following was an exceptionally good one; it was also discovered that the hufuf plant adapted very nicely to cultivation on Yorba, The double cultivation has prevented any further shortages. 401 FtirttKT references: Marcus Vaader Force Fields and Their Applications tr Frunlan Zhauwab (Riehese New Caledonia State UP) ONN. Hie festival city whose design and construction were commissioned by Leto II in 10592, perhaps the largest angle-purpose building project in known history Onn housed the Fish Speakers' chief school, off-world embassies, trade headquarters, service and maintenance cadres, museums ancHibranes, but these facilities took up less than ten percent of the city Onn's chief purpose was to house Leto's decennial Festival, and its construction was centered about one function the public viewing of the God Emperor The city center was a gigantic plaza measuring two kilometers across, ringed by balconies and standing platforms acconmiodat-ing hundreds of thousands of Leto's subjects, the audience was further enlarged by the Ixian projectors stationed throughout the plaza The projector