Geometric Model, L. Brill No. 158. Ser. 6 No. 3, Wave Surface with Stand

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This white plaster model shows a wave surface of a negative uniaxial crystal. It is an ellipsoid, cut away in one quadrant to reveal a portion of a sphere. A paper tag on the model reads: 158. Another tag reads: Wellenfl. für opt. einax. Krystalle. (/) Verl. v. L. Brill. 6. Ser. Nr. 3.
The model rests on a wooden stand painted black. A pencil mark on the bottom of the stand reads: VI.3.
This is one of a series of models designed at the Munich polytechnic high school under the direction of Alexander Brill in 1880.
This particular example of the model was exhibited at the Columbian Exposition, a World’s Fair held in Chicago in 1893.
Compare to 1982.0795.23.
L. Brill, Catalog, 1892, p. 13, 87.
For examples of related models, with a reference to a related publication, see the Goettingen collection of mathematical models, model numbers 283 (Schilling #356) and 284 (Schilling #357).
Currently not on view
date made
L. Brill
place made
Deutschland: Hessen, Darmstadt
Physical Description
wood (overall material)
plaster (overall material)
overall: 9 cm x 10.4 cm x 10.4 cm; 3 17/32 in x 4 3/32 in x 4 3/32 in
model without stand: 7.8 cm x 8.5 cm x 8.5 cm; 3 1/16 in x 3 11/32 in x 3 11/32 in
ID Number
catalog number
accession number
Credit Line
Gift of Wesleyan University
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Data Source
National Museum of American History


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