Skip to main content

Search

My Visit
Donate
Home Smithsonian Institution

Site Navigation

  • Visit
    • Hours and Locations
    • Entry and Guidelines
    • Maps and Floor Plans
    • Dining and Shopping
    • Accessibility
    • Visiting with Kids
    • Group Visits
  • What's On
    • Exhibitions
      • Current Exhibitions
      • Upcoming
      • Past Exhibitions
      • Online Exhibitions
    • Today's Events
    • Online Events
    • All Events
    • IMAX & Planetarium
  • Explore
    • Art & Design
    • History & Culture
    • Science & Conservation
    • Collections
      • Open Access
    • Research Resources
      • Libraries
      • Archives
        • Smithsonian Institution Archives
        • Air and Space Museum
        • Anacostia Community Museum
        • American Art Museum
        • Archives of American Art
        • Archives of American Gardens
        • American History Museum
        • American Indian Museum
        • Eliot Elisofon Photographic Archives, African Art
        • Freer and Sackler Archives
        • Hirshhorn Archive
        • National Anthropological Archives
        • National Portrait Gallery
        • Ralph Rinzler Archives, Folklife
        • Libraries' Special Collections
    • Blogs
    • Podcasts
    • Mobile Apps
  • Learn
    • For Kids and Teens
    • For Educators
      • Resources
      • Field Trips
      • Professional Development
      • Events
    • Youth Programs
    • Fellowships and Internships
  • Get Involved
    • Volunteer
      • Behind-the-Scenes
      • Digital Volunteers
      • Smithsonian Call Center
      • Visitor Information Specialist
      • Docent Programs
    • Citizen Science
    • Work with Us
      • Office of Human Resources
        • Working Here
        • Employee Benefits
        • Job Opportunities
        • How to Apply
        • Job Seekers with Disabilities
        • Frequently Asked Questions
        • SI Civil Program
        • Contact Us
      • Affiliations
      • Global Partners
  • Support
    • About Membership
    • Become a Member
    • Renew Your Membership
    • Make a Gift
  • About
    • Museums and Zoo
    • Research Centers
    • Cultural Centers
    • Education
    • Our Organization
      • Leadership
        • Secretary Bunch
        • Advancement
        • Communications
        • Administration
        • Education
        • Museums and Culture
        • Science and Research
      • Board of Regents
        • Members
        • Committees
        • Reading Room
        • Bylaws, Policies and Procedures
        • Contact
        • Schedules and Agendas
        • Meeting Minutes
        • Actions
        • Webcasts
      • General Counsel
        • Legal History
        • Internships
        • Records Requests
          • Records Request Reading Room
        • Tort Claim
        • Subpoenas & Testimonies
        • Events
      • Equal Employment Office
        • EEO Complaint Process
        • Individuals with Disabilities
        • Special Emphasis Program
        • Supplier Diversity Program
          • Doing Business with Us
          • Policies and Procedures
          • Additional Resources
          • Goals and Accomplishments
      • Sponsored Projects
        • Policies
          • Animal Care and Use
          • Human Research
        • Reports
        • Internships
    • Reports and Plans
      • Annual Reports
      • Metrics Dashboard
        • Dashboard Home
        • Virtual Smithsonian
        • Public Engagement
        • National Collections
        • Research
        • People & Operations
        • One Smithsonian
      • Strategic Plan
    • Newsdesk
      • News Releases
      • Media Contacts
      • Photos and Video
      • Media Kits
      • Fact Sheets
      • Visitor Stats
      • Secretary and Admin Bios
      • Filming Requests

Painting - Locus of Point on Chord (Plato)

National Museum of American History
Social Media Share Tools
    • Print

Object Details

referenced
Plato
painter
Johnson, Crockett
Description
The locus of the midpoints of the chords of a given circle that pass through a fixed point is a circle when the point lies inside of or on the circle. The small circle painted white is the locus of the midpoints of chords drawn in the large circle that pass through a point toward the top left of the inside of the circle. Three chords of the large circle are suggested. These are the diameter, whose midpoint is the center of the circle, a vertical chord through the point, and a horizontal chord through the point (only a small part of this chord is indicated). The painting is based on a diagram from College Geometry by Nathan Court. It is unclear why Crockett Johnson associated this painting with Plato.
The oil painting on masonite is #41 in the series. It has a background of two purple and gray rectangles. It has a metal and wooden frame. It shows a circle with a smaller circle inside it. The smaller circle is in two shades of white, the larger one in orange, black, gray and light purple. The painting is signed: CJ66. It is marked on the back: Crockett Johnson 1966 (/) LOCUS OF POINT ON CHORD (PLATO).
Reference: Nathan Court, College Geometry, (1964 printing), p. 13. This figure is annotated in Crockett Johnson's copy of this volume.
Credit Line
Ruth Krauss in memory of Crockett Johnson
1966
ID Number
1979.1093.29
catalog number
1979.1093.29
accession number
1979.1093
Object Name
painting
Physical Description
masonite (substrate material)
wood (frame material)
metal (frame material)
Measurements
overall: 25 in x 25 in x 1 1/2 in; 63.5 cm x 63.5 cm x 3.80009 cm
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Crockett Johnson
Art
Exhibition
NMAH Board Room Entry
Exhibition Location
National Museum of American History
National Museum of American History
Record ID
nmah_694653
Metadata Usage (text)
CC0
GUID (Link to Original Record)
http://n2t.net/ark:/65665/ng49ca746a5-33b9-704b-e053-15f76fa0b4fa

Related Content

  • Mathematical Paintings of Crockett Johnson

    American History Museum
  • Mathematical Paintings of Crockett Johnson:About

    American History Museum
  • Mathematical Paintings of Crockett Johnson:Resources

    American History Museum
Locus of Point on Chord (Plato)
There are restrictions for re-using this image. For more information, visit the Smithsonian's Terms of Use page .
International media Interoperability Framework
IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more.
View manifest View in Mirador Viewer

Footer logo

Link to homepage

Footer navigation

  • Contact Us
  • Press Room
  • Human Resources
  • Host Your Event
  • Access Smithsonian
  • EEO & Supplier Diversity
  • Inspector General
  • Records Requests
  • Privacy
  • Terms of Use

Social media links

  • Facebook
  • Instagram
  • Twitter
  • YouTube

Email signup form

Email powered by BlackBaud (Privacy Policy, Terms of Use)
Back to Top