Model for Descriptive Geometry by A. Jullien - Representation of a Pyramid

National Museum of American History
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Object Details

Jullien, A.
Description
Three points, a, b, and c on the horizontal plane make the triangular base of the pyramid. Point (s, s’) at the bend in the wire will be the apex. The three black strings represent the three remaining edges of the pyramid. Notice that the apex is not above the base. The various projections after rotation to the horizontal plane allow the lengths of the sides to be found. The height of the pyramid is segment sS3.
For more details, see COLL.1986.0885 and 1986.0885.01.01.
Location
Currently not on view
ca 1880
ID Number
1986.0885.01.30
catalog number
1986.0885.01.30
accession number
1986.0885
Object Name
geometric model
Physical Description
paper (overall material)
metal (overall material)
Measurements
overall: 6.5 cm x 7.5 cm x 6.5 cm; 2 9/16 in x 2 15/16 in x 2 9/16 in
place made
France: Île-de-France, Paris
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Jullien Geometric Models
National Museum of American History
subject
descriptive geometry
Record ID
nmah_1802217
Metadata Usage (text)
CC0
GUID (Link to Original Record)
http://n2t.net/ark:/65665/ng49ca746b2-d45d-704b-e053-15f76fa0b4fa
Set of Geometric Models by A. Jullien, Relief 30
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