Object Details
- Description
- Like several other models made by the Jesuit mathematician Joseph F. MacDonnell of Fairfield University, this model shows a surface swept out by a moving straight line. Such a surface is called a ruled surface. It is represented by the cylindrical coordinates (r, t, z) by the equation r = a + z tan (pt/q). The model has a clear plastic cylindrical exterior, with pink plastic threads inside it that represent the surface. Here the ratio p/q = 1/2 and the fraction 1/2 is marked on the outside of the cylinder.
- Location
- Currently not on view
- Data Source
- National Museum of American History
- maker
- MacDonnell, S.J., Father Joseph
- Credit Line
- Gift of Father Joseph MacDonnell, S.J.
- Physical Description
- plastic (overall material)
- Measurements
- overall: 25.5 cm x 10.2 cm x 10.2 cm; 10 1/32 in x 4 1/32 in x 4 1/32 in
- Object Name
- geometric model
