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  View of the Heavens, being a System of Modern Astronomy. Image 1.

  Richard Turner

  Title page with a table of contents.

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  View of the Heavens, being a System of Modern Astronomy. Image 10.

  Richard Turner

  Illustration of a globe being suspended from the ceiling in a room demonstrating how the sun causes shadows around celestial bodies. Pg. 31.

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  View of the Heavens, being a System of Modern Astronomy. Image 2.

  Richard Turner

  Diagram of the Copernican system of the solar system, showing the way planets move about the sun.

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  View of the Heavens, being a System of Modern Astronomy. Image 3.

  Richard Turner

  Diagram of the sun and the movement of sunspots. Pg. 3.

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  View of the Heavens, being a System of Modern Astronomy. Image 4.

  Richard Turner

  Map of the moon that identifies its craters, mountains, and other unique features. Pg. 11.

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  View of the Heavens, being a System of Modern Astronomy. Image 5.

  Richard Turner

  Illustration of a standard celestial globe and celestial sphere. The globe shows the Earth's features while the sphere shows celestial bodies with respect to the Earth.

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  View of the Heavens, being a System of Modern Astronomy. Image 6.

  Richard Turner

  Illustration showing how to observe an image of the sun through an open window using a telescope. Pg. 53.

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  View of the Heavens, being a System of Modern Astronomy. Image 7.

  Richard Turner

  Whole world map according to the 18th century's most recent discoveries and knowledge.

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  View of the Heavens, being a System of Modern Astronomy. Image 8.

  Richard Turner

  Interactive diagram of a geographical clock -- has moveable parts to allow users to operate the clock to practice while reading. Pg. 21.

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  View of the Heavens, being a System of Modern Astronomy. Image 9.

  Richard Turner

  Diagram of a celestial globe above three smaller illustrations showing the celestial globe in its three main positions. There is a note at the bottom of the page directing a reader to an instrument maker who can make celestial globes.

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  Christiani Hugenii Zulichemii, dum viveret Zelemii Toparchae, Opera Varia. Image 1.

  Christian Huygens

  Author portrait in an illustrated frame. To the left, there is a smaller pasted image of the author -- likely of him at an older age.

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  Christiani Hugenii Zulichemii, dum viveret Zelemii Toparchae, Opera Varia. Image 10.

  Christian Huygens

  Table of contents and chapter introductory page.

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  Christiani Hugenii Zulichemii, dum viveret Zelemii Toparchae, Opera Varia. Image 2.

  Christian Huygens

  Title page/frontispiece.

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  Christiani Hugenii Zulichemii, dum viveret Zelemii Toparchae, Opera Varia. Image 3.

  Christian Huygens

  Diagram of the movement of a pendulum-like object. Pg 48.

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  Christiani Hugenii Zulichemii, dum viveret Zelemii Toparchae, Opera Varia. Image 4.

  Christian Huygens

  Diagram of a time-telling instrument. Pg 52.

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  Christiani Hugenii Zulichemii, dum viveret Zelemii Toparchae, Opera Varia. Image 5.

  Christian Huygens

  Three geometric diagrams -- one based on a circle, one a rectangle, and one a triangle. Pg. 154.

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  Christiani Hugenii Zulichemii, dum viveret Zelemii Toparchae, Opera Varia. Image 6.

  Christian Huygens

  Several geometric diagrams -- one based on a circle, one a rectangle, and several on a triangle. Pg. 160.

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  Christiani Hugenii Zulichemii, dum viveret Zelemii Toparchae, Opera Varia. Image 7.

  Christian Huygens

  Diagrams of some of Huygens' mechanical inventions -- used for things such as time-telling and measuring. Pg. 262.

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  Christiani Hugenii Zulichemii, dum viveret Zelemii Toparchae, Opera Varia. Image 8.

  Christian Huygens

  Diagrams of some of Huygens' mechanical inventions -- used for things such as time-telling and measuring. Pg. 286.

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  Christiani Hugenii Zulichemii, dum viveret Zelemii Toparchae, Opera Varia. Image 9.

  Christian Huygens

  Geometric drawings alongside a mechanical diagram of a scientific instrument. Pg. 776.

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  De geheele mathesis of Wiskonst: herstelt in zijn natuurlijke gedaante. Image 1.

  Abraham de Graaf

  Title page/frontispiece. Displays mariners, navigators, and mythical figures holding a variety of scientific instruments.

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  De geheele mathesis of Wiskonst: herstelt in zijn natuurlijke gedaante. Image 10.

  Abraham de Graaf

  Exterior of book.

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  De geheele mathesis of Wiskonst: herstelt in zijn natuurlijke gedaante. Image 2.

  Abraham de Graaf

  Geometric diagrams -- including 'floating hands' showing readers how to use instruments.

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  De geheele mathesis of Wiskonst: herstelt in zijn natuurlijke gedaante. Image 3.

  Abraham de Graaf

  Perspective diagrams -- helping readers understand visual perspective using small figures in upper-class dress.

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  De geheele mathesis of Wiskonst: herstelt in zijn natuurlijke gedaante. Image 4.

  Abraham de Graaf

  A variety of perspective diagrams including simple line drawings and more elaborate illustrations of objects in domestic spaces to help explain visual perspective.