**Serie V; Plaster models**

Number | Title | Date of Design | Dimension (cm) | Material |

Serie V, nr. 2a | Surface of revolution with constant positive curvature with geodesics. The sphere. | 1880 | 9-9-9 | Plaster |

Serie V, nr. 2b | Surface of revolution with constant positive curvature with geodesics. The meridian of the surface of revolution meets the axis. | 1880 | 11-7-7 | Plaster |

Serie V, nr. 2c | Surface of revolution with constant positive curvature with geodesics. The meridian of the surface of revolution does not meet the axis. | 1880 | 10-10-12 | Plaster |

Serie V, nr. 3 | Generalized helicoid with constant positive curvature. | 1880 | 24-15-15 | Plaster |

Serie V, nr. 4 | Generalized helicoid with constant negative curvature. | 1880 | 24-15-15 | Plaster |

Serie V, nr. 5a | Four forms of the cyclide of Dupin. Ring cyclide with imaginary double points. | 1880 | 7-14 | Plaster |

Serie V, nr. 5b | Four forms of the cyclide of Dupin. Horn cyclide; two real double points join the two sheets of the surface lying apart | 1880 | 6-19 | Plaster |

Serie V, nr. 5c | Four forms of the cyclide of Dupin. Spindle cyclide; one sheet of the surface lying on another and joint by two real double points | 1880 | 10-11 | Plaster |

Serie V, nr. 5d | Four forms of the cyclide of Dupin. Parabolic cyclide with two real double points; spreads out to infinite with a single sheet of the surface | 1880 | 12-15 | Plaster |

Serie V, nr. 6 | The catenary on a sphere | 1880 | 9 | Plaster |

Serie V, nr. 7a | The envelope of the geodesic lines on the ellipsoid, coming from one point. The extended ellipsoid of revolution. | 1880 | 12-12-8 | Plaster |

Serie V, nr. 7b | The envelope of the geodesic lines on the ellipsoid, coming from one point. Spheroid, with the envelope for two different starting points. | 1880 | 7-7-10 | Plaster |