In this book which is also designated as Tangenten No.4, a small square of mirror is set in stamped out thin card pages. One glassine page overlays it with a printed magic square poem. Parts of the backing of the mirror have been scatched out by the artist and it has been glued down to the card. Poetry has been printed on the pages with the stamped out sections. This book was edited by Walter Aue. -- Source of annotation: Marvin or Ruth Sackner.

The Sackner Archive holds "Exploding Galaxy," "Lotterie Romane," "E835," and "Geschutztes Messer," works that are depicted in photographic reproductions in this catalogue. There is also a listing and description of the objects made by Schauffelen 1966-1976. In this deluxe copy, there is a printed folded collage held in place by slits of the papercard sheet that is inserted into the inside front cover. -- Source of annotation: Marvin or Ruth Sackner.

The Sackner Archive holds "Exploding Galaxy," "Lotterie Romane," "E835," and "Geschutztes Messer," works that are depicted in photographic reproductions in this catalogue. There is also a listing and description of the objects made by Schauffelen 1966-1976. -- Source of annotation: Marvin or Ruth Sackner.