L. Brill No. 159, Ser. 10.1 No. 7, D41,6
date: label: date made
content: 1889
label: date made
content: 1889
name: label: maker
content: L. Brill
notes: label: Description
content: The German label on this white plaster model indicates that it is a model of a wave surface for a uniaxial optical crystal, Brill Ser. 6 No. 3. The catalog entry for that Brill number adds (with negative birefringence) at the end of the title. Such a model always has an outer shell that is an ellipsoid and an inner shell that is a sphere. However, this model is a sphere with one octant cut away to reveal part of an ellipsoid. Thus this is a model of a wave surface of a positive uniaxial crystal, whose Brill model number is No. 159, Ser. 10.1 No. 7.
label: Description
content: Stand 304722.23.01 may be for this model, as both have tag D41,6.
label: Description
content: Compare to 1985.0112.125.
label: Description
content: The correct label for this model appears on 1982.0795.23.
label: Description
content: This is one of a series of models designed at the Munich polytechnic high school under the direction of Alexander Brill in 1885.
label: Description
content: References:
label: Description
content: L. Brill, <I>Catalog</I>, 1892, p. 21, 87.
label: Description
content: 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).
label: Description
content: Francis A. Jenkins and Harvey E. White, <I>Fundamentals of Optics</I>, New York: McGraw Hill, 1976, p. 553-555.
label: Location
content: Currently not on view
place: label: place made
content: Germany
topic: label: Subject
content: Mathematics
setName: label: See more items in
content: Medicine and Science: Mathematics
label: See more items in
content: Science & Mathematics
creditLine: label: Credit Line
content: Gift of the Department of Mathematics, The University of Michigan
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1982.0795.21
label: catalog number
content: 1982.0795.21
label: accession number
content: 1982.0795
objectType: label: Object Name
content: Geometric Model
physicalDescription: label: Physical Description
content: plaster (overall material)
label: Measurements
content: overall: 10 cm x 10 cm x 10 cm; 3 15/16 in x 3 15/16 in x 3 15/16 in