Document B54991Oo025ny03p0RYXaD3Em

14256997033 2002-02-26 19:09:21 (GMT), page 25 24 techniques, which was highly critical of the midget impinger method, he asked, "Can an Inaccurate instrument like the midget impinger, give an accurate result?"(1969) Rendall responded, "I have not had enough experience with the MI but it is the wrong instrument on which to base standards." Incredibly, four years later, Mr. Gibbs who was the next speaker after Rendall, suggested that the MI be used for this purpose. Dose response relationships based on a completely inaccurate, but apparently large set of exposure data provide a false sense of statistical security to these results. Measuring Visible Fibers: The Iceberg Effect 24