This photo appears to have been taken from within the concrete wall that surrounds the industrial area.  I believe it to be one of the best photos ever taken of the second floor hall of science layout.  It makes effective use of the forced perspective made possible by the use of undersized buildings and the backdrop.   The only features detracting from the forced perspective are the street lamp in back of the factory that towers about two stories higher than the building and the large tunnel portal in the wall.  The backdrop adds immensely to the interest of this photo as can be sen from comparing this photo to the aerial view of the right end of the layout.  This photo also appears in somewhat cropped form in the 1951 catalog on page 5.