Construct the linkage to draw the lemniscate as thus: |

Construct the linkage to draw the lemniscate as thus: |

Construct the linkage to draw the lemniscate as thus: |

Construct the Peaucellier's cell. |

Construct the Hart's linkage. |

Construct the linkage to draw the ellipse as thus: |

Construct the linkage to draw the ellipse as thus: |

Construct the linkage to draw the ellipse as thus: |

Construct the linkage to draw the ellipse as thus: |

Construct the linkage to draw the ellipse as thus: |

Construct the linkage to draw the ellipse as thus: |

Construct the linkage to draw the ellipse as thus: |