Göttingen Collection of Mathematical Models and Instruments

	(349) Projection of the four-dimensional 5-cell		(350) Projection of the four-dimensional 8-cell
	(351) Projection of the four-dimensional 16-cell		(352) Projection of the four-dimensional 24- cell
	(353) Three-dimensional grid of the 5-cell		(354) Three-dimensional grids of the 8- cell
	(355) Three-dimensional grids of the 5-,8-,16 cell		(400) Desargues' thesis in space and in the plane
	(401) Schläfli double six		(419) 10 pairwise orthogonal lines
	(420) Determination of a special double six by five points in space		(431) Large demonstration model of the Desargues' theorem in space