Geometric Model, L. Brill No. 137. Ser. 8 No. 26a, Spiral Surface


This white plaster model has a round base and a vertical spiral of eight turns. It is one of a series copied from originals at the technical high school in Munich, under the direction of Alexander Brill. A paper tag on the model reads: 137. Another paper tag reads: Schraubenfl. auf d. Ellips. abwickelbar. (/) Verl. v. L. Brill. 8. Ser. Nr. XXVIa.

The model represents the surface of a screw on which a rotational ellipsoid (1985.098 - Brill #138) can be unwound. It follows ideas of E. Bour. The series was first published by Ludwig Brill in 1882.

This example of the model was exhibited at the German Educational Exhibit at the Columbian Exposition, a World’s Fair held in Chicago in 1893. It there was purchased by Wesleyan University in Connecticut, and subsequently was donated to the Smithsonian.

Date Made: 1892

Maker: L. Brill

Location: Currently not on view

Place Made: Germany: Hesse, Darmstadt

Subject: Mathematics

See more items in: Medicine and Science: Mathematics, Science & Mathematics


Exhibition Location:

Credit Line: Gift of Wesleyan University

Data Source: National Museum of American History

Id Number: 1985.0112.097Catalog Number: 1985.0112.097Accession Number: 1985.0112

Object Name: geometric modelgeometric model

Physical Description: plaster (overall material)Measurements: overall: 25.5 cm x 13 cm x 13 cm; 10 1/32 in x 5 1/8 in x 5 1/8 in


Record Id: nmah_693973

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.