National Museum of American History
Model for Descriptive Geometry by A. Jullien - Horizontal Line to a Plane (Construct a Line Parallel to a Given Plane through a Point)
Jullien, A. · ca 1880
Plane APA’ is given. The line shown by the wire through (m, m’) and (c, c’) is constructed parallel to both the plane APA’ and the horizontal plane.
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