Enlargement and Composition
Until now, we have considered the celluloid band in its entirety. However, as we proceed we find that the space of the picture is subdivided into smaller units which in turn consist of smaller parts which are assembled from still smaller entities. This cutting up of the whole of the space brings the danger that the smaller units will fall apart. Consequently, we must search for ways and means of connecting the divided parts.
At this point, however, we are not ready to examine the subdivision and connection of the story structure. We shall confine ourselves to the investigation of the purely technical and mechanical subdivision of the celluloid band. And here we find that the smallest entity is the picture frame. ...