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Function and positioning of a portable sundial
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1. It was important to ensure that the clock is arranged on absolutely horizontal ground 2. The sundial was placed in a position so that the vertical block cast its shadow precisely on the diagonal slope of the clock, and not to either side. |
The scale, marked as diagonal lines on the sloping surface, was differentiated by vertical lines, forming one vertical zone for each month or a season of the year, so that it was possible to read off the correct time for the relevant period.