Watch FilmoFlix. This work is in five reels (numbered, but called "reels" so that they don't take on the connotations of "Parts" - thus each simply a part of the "trail" of colored scratches, white scratches ((on black & white leader) which suggest, to me, a passage). The third "reel" combines these scratches with some motion picture film, mostly of the ocean. The fifth reel is the only one which has a sound track; but of course that makes the whole work a "SOUND film" because the audio track must be turned-on from the beginning.