| Initial Concepts.3 | 2 | 1 |  |
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Arts index... |
| Working principle. | ||||||
| Introduction. | Site Index... | |||||
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| <Stile. |   |
Glory Hole > | ||||
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The Spheres Central bar
acts as a 'Gnomon', Casting A shadow around the outer ring. Because the Gnomon is orientated towards True South & parallel to the earths axis the shadows position on theouter ring is, theoretically proportional to the Earth's angle of rotation. |
| Recommended reading:'Sundials, Their theory & Construction' by AlbertE.Waugh, Dover Publications. | |
| 'Gnomon' used to strike shadow across band. |  |
Roman numerals cut into band. |
| Shadow indicating 12:30 G.M.T/ 13:30 British summertime. |
