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Hourglass influencing factors
- Jan 08, 2019 -

201901031719433322496.jpgFactors affecting the hourglass include: the amount of filler, the curved shape of the inner wall of the glass sphere (the difference between the hourglass and the inverted hour length), the width of the neck tube, the type and quality of the filler. The earliest hourglass used to use tomb marble powder, iron filings and eggshell powder. Modern hourglasses generally use artificially made glass beads. According to the German hourglass manufacturer KOCH's documentation, the 30-minute hourglass error can be controlled within 1 minute, and the hourly hourglass error is about 5 minutes. Note: It is not a timing instrument that can be compared to the accuracy of modern timing instruments.

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