Model for Descriptive Geometry by A. Jullien - Intersection of Two Planes Parallel to a Line on the Ground (The x-axis)

Planes CDD’C’ and ABB’A’ are both parallel to the x-axis (crease in the card). They intersect in line (e, e’)-(f, f’) (wire) which is also parallel to the x-axis. The planes can be visualize by imagining both red strings extending left and right. Both projections of this intersection are shown as well as the rotation of it about the horizontal line perpendicular to the x-axis PA.
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
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Jullien Geometric Models
Data Source
National Museum of American History, Kenneth E. Behring Center


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