Geometric Model, Ruled Surface in Cylinder
name: label: maker
content: MacDonnell, S.J., Father Joseph
notes: label: Description
content: 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.
label: Location
content: Currently not on view
place: label: place made
content: United States: Connecticut, Fairfield
topic: label: Subject
content: Mathematics
setName: label: See more items in
content: Medicine and Science: Mathematics
creditLine: label: Credit Line
content: Gift of Father Joseph MacDonnell, S.J.
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1986.3075.03
label: nonaccession number
content: 1986.3075
label: catalog number
content: 1986.3075.03
objectType: label: Object Name
content: geometric model
physicalDescription: label: Physical Description
content: plastic (overall material)
label: Measurements
content: 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