Model for Descriptive Geometry by A. Jullien - Representation of a Line (Special Cases)

This relief shows four more special cases of lines. It is one of two reliefs that are about twice as long as the rest. The wires and strings are missing, so it is difficult to visualize the representations. (Note that the wire coming out of the horizontal plane on the far right is not correct, it is in fact one of the support pieces. This is how the relief was configured when it arrived at the Smithsonian.)
Figure 1 on the left shows the vertical and horizontal projections of two lines as well as the intersection of the two lines projected onto the vertical plane.
Figure 2 shows the angle of inclination of the line with the horizontal plane by rotating it down onto the horizontal plane.
Figure 3 shows the angle of a line coming up through the horizontal plane with the vertical, again by rotating it onto the horizontal.
Figure 4 shows the vertical projection of a line and the horizontal projection of its vertical component.
For more details, see COLL.1986.0885 and 1986.0885.01.01.
Currently not on view
Object Name
geometric model
date made
ca 1880
Jullien, A.
Physical Description
paper (overall material)
metal (overall material)
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
ID Number
catalog number
accession number
descriptive geometry
Science & Mathematics
Jullien Geometric Models
See more items in
Medicine and Science: Mathematics
Jullien Geometric Models
Data Source
National Museum of American History, Kenneth E. Behring Center

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