Geometric Model of A. Harry Wheeler or a Student, Segment of a Cone
name: label: teacher
content: Wheeler, Albert Harry
label: maker
content: Barrington, C. R.
notes: label: Description
content: To show relationships among planes and angles, A. H. Wheeler designed a series of what he called platform models. Most of these, including this one, had a rectangular base. Here a segment of a cicular ring is cut out of the base. The ting holds a square folded in half and a trinagle with base equal to the length of the diameter of the square and height shorter than half the diameter. Both The square and the rectangle have grooves cut in them so that they rotate in the ring. The triangle fits inside the folded square along the diameter. The vertices of the square and the apex of the triangle can be adjusted to lie along a line PQR on the base.
label: Description
content: A mark on the model reads: Barrington.
label: Description
content: The model may be designed to illustrate a theorem in Wentworth's book on plane and solid geometry that states that oblique lines drawn from a point to a plane, meeting the plane at equal distances from the foot of the perpendicular, are equal; and of two oblique lines, meeting the plane at unequal distances from the foot of the perpendicular, the more remote is the greater.
label: Description
content: Reference:
label: Description
content: George A. Wentworth, <I>Plane and Solid Geometry</I>, Boston: Ginn, 1899, p. 258.
label: Location
content: Currently not on view
place: label: place made
content: United States: Massachusetts, Worcester
topic: label: Subject
content: Mathematics
setName: label: See more items in
content: Medicine and Science: Mathematics
label: See more items in
content: Science & Mathematics
creditLine: label: Credit Line
content: Gift of Helen M. Wheeler
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: MA.304723.492
label: accession number
content: 304723
label: catalog number
content: 304723.492
objectType: label: Object Name
content: Geometric Model
physicalDescription: label: Physical Description
content: paper (overall material)
label: Physical Description
content: tan (overall color)
label: Physical Description
content: cut and folded (overall production method/technique)
label: Measurements
content: average spatial: 7.5 cm x 8 cm x 5.8 cm; 2 15/16 in x 3 5/32 in x 2 9/32 in