148 MR. EISENBUD: I'm not sure that MR. CASSIDY: This is one of the everyone will understend how we got the ine formetion on the tape. TI think that ia an important point because this provides very excellent training. things that I wanted to bring out. We can reproduce any fallout pattern conceivable by very eesy techniqueg, We use a recorder and we take the intensities along a path here and we plot them on a piece of graph paper. All we do is, we have a piece of graph paper and this 4s the distance on this horizontal line. Ve plot the intensity on a plece of graph paper. We do this here and on the XY Recorder, we have a curve and all we do is connect the proper DC potential across the potentiometer so that we end up vith a DO signal comparable to the signal that ve ordinarily get out of here, Then we feed it to the telemater information station and that reverses the AC which we put on the tape. —_,— By doing that

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