Point No. 8 is a little fragment of bakelite or debris extending out from the edge, that shows in both of the charts in the same manner. In addition the corner at eight tends to curve in towards the picture as it approaches the corner, there tends to be a curvature in and not a nice neat square corner.
In addition, between points 2 and 3 there is a very definite S-curve where the bakelite from which the camera is made apparently warped slightly making this S-curve, and this is apparent in both charts. Again, more apparent as you hold the photograph flat and look down the line.
Mr. Eisenberg. Now, the margins of the shadowgraph in the right-hand side of the chart, which is based upon 133B, look somewhat larger than the margins on the left-hand side.
Could you explain that?
Mr. Shaneyfelt. That was merely a matter of masking during the printing process.
Mr. Eisenberg. That is to say it is the interior which is crucial rather than the width of the margin?
Mr. Shaneyfelt. That is correct.
Mr. McCloy. This mark along the bottom appears in one. How do you explain that?
Mr. Eisenberg. Mr. McCloy is pointing to a mark along the right-hand side, a white mark along the bottom of the shadowgraph.
Mr. Shaneyfelt. Yes; that is the cut edge of the negative, where this particular negative has been cut very close to the shadowgraph line and this then appears as a white line along the chart and represents the actual edge of the negative.