6. In the middle of the city place a marble amussium, laying it true by the level, or else let the spot be made so true by means of rule and level that no amussium is necessary. In the very centre of that spot set up a bronze gnomon or “shadow tracker” (in Greek σκιαθήρας). At about the fifth hour in the morning, take the end of the shadow cast by this gnomon, and mark it with a point. Then, opening your compasses to this point which marks the length of the gnomon's shadow, describe a circle from the centre. In the afternoon watch the shadow of your gnomon as it lengthens, and when it once more touches the circumference of this
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chapter:
PREFACE
CHAPTER I: THE EDUCATION OF THE ARCHITECT
CHAPTER II: THE FUNDAMENTAL PRINCIPLES OF ARCHITECTURE
CHAPTER III: THE DEPARTMENTS OF ARCHITECTURE
CHAPTER IV: THE SITE OF A CITY
CHAPTER V: THE CITY WALLS
CHAPTER VI: THE DIRECTIONS OF THE STREETS; WITH REMARKS ON THE WINDS
CHAPTER VII: THE SITES FOR PUBLIC BUILDINGS
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BOOK I
BOOK II
BOOK III
BOOK IV
BOOK V
BOOK VI
BOOK VII
BOOK IX
6. In the middle of the city place a marble amussium, laying it true by the level, or else let the spot be made so true by means of rule and level that no amussium is necessary. In the very centre of that spot set up a bronze gnomon or “shadow tracker” (in Greek σκιαθήρας). At about the fifth hour in the morning, take the end of the shadow cast by this gnomon, and mark it with a point. Then, opening your compasses to this point which marks the length of the gnomon's shadow, describe a circle from the centre. In the afternoon watch the shadow of your gnomon as it lengthens, and when it once more touches the circumference of this
Vitruvius: The Ten Books on Architecture. Vitruvius. Morris Hicky Morgan. Cambridge: Harvard University Press. London: Humphrey Milford. Oxford University Press. 1914.
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References (5 total)
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(2):
- A Dictionary of Greek and Roman Antiquities (1890), AGRIMETA´TIO
- A Dictionary of Greek and Roman Antiquities (1890), AMUSSIS
- Cross-references in general dictionaries to this page
(3):
- Lewis & Short, circĭnātĭo
- Lewis & Short, indāgātor
- Lewis & Short, lībella
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