If you haven't figured out the missing Z frames yet in relationship to Wiegman's first 11 seconds of Dealy Plaza film, just take the difference between Myer's incorrect start at z246 and the equation above(+/- 1frame). This should help you understand why the following is so important: Mr. SHANEYFELT. The camera operates at a speed of 18.3 frames per second. So that in two and a quarter seconds it would run through about 42--41 to 42 frames.  Representative FORD. Then the firing of th