The frame for this collapsible model is a paper square folded diagonally. Threads joining opposite sides form a ruled surface (a hyperbolic paraboloid). The ourside is covered with black cloth.
A mark on the model reads: No. 318. Another mark reads: P. Malmberg (/) Feb. 25, 1927.
Our collection database is a work in progress. We may update this record based on further research and review. Learn more about our approach to sharing our collection online.
If you would like to know how you can use content on this page, see the Smithsonian's Terms of Use. If you need to request an image for publication or other use, please visit Rights and Reproductions.