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| List of illustrations | |
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| Preface | |
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| A little astronomy | |
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| The moving Earth | |
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| Geographical coordinates | |
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| The Celestial Sphere and the local Celestial Sphere | |
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| The Sun's annual motion | |
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| The Sun's diurnal motion | |
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| The hour angle of the Sun | |
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| The equation of time | |
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| An introduction to sundials | |
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| A brief history of sundials | |
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| A brief history of time | |
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| The general principle of the sundial | |
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| The conversion of solar time to clock time | |
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| Finding the local meridian | |
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| The gnomon | |
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| The first gnomons | |
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| Determining local latitude | |
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| The solar calendar | |
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| A seasonal indicator | |
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| Equatorial sundials | |
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| The principle of the equatorial sundial | |
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| Marking out the classic equatorial sundial | |
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| Uses of the equatorial sundial | |
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| Determining the meridian | |
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| The armillary equatorial sundial | |
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| Horizontal sundials | |
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| The principle of the horizontal sundial | |
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| Marking out, using the equatorial sundial | |
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| Trigonometrical marking | |
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| Indicating the dates of the equinoxes | |
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| Indicating noon for a different location | |
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| Marking out a horizontal sundial without calculation | |
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| Babylonian and Italic time | |
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| Polar sundials | |
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| The principle of the polar sundial | |
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| Marking out the sundial | |
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| Vertical sundials | |
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| Vertical sundials | |
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| Making a vertical direct south sundial | |
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| Making a vertical direct north sundial | |
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| Making vertical direct west and direct east sundials | |
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| Making a reflection sundial | |
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| Making a sundial on a plane surface without calculation | |
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| Horizontal analemmatic sundials | |
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| The analemmatic sundial | |
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| Marking out the analemmatic sundial | |
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| Demonstration of the principle of the analemmatic sundial | |
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| Making a solar compass | |
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| The circular analemmatic sundial | |
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| Altitude sundials | |
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| The principle of the altitude sundial | |
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| The Saint Rigaud Capuchin sundial | |
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| Sundials in the tropics | |
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| Sundials in the tropics | |
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| Sundials north of the Equator | |
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| Sundials south of the Equator | |
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| A little test | |
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| Hour lines | |
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| The equation of time and the Sun's declination | |
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| Formulae for diurnal motion | |
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| Demonstrations | |
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| Small problems in gnomonics | |
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| Practicalities of constructing a sundial | |
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| Mottoes on sundials | |
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| Bibliography | |
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| Glossary | |
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| Index | |