File:Nocturnal (instrument).jpg

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Description A nocturnal as costume jewellery. This is a functioning nocturnal, though only about 5 cm tall. It shows the month ring on the outside in brass. The inner disk shows the time and has an indicator on one edge. By setting the indicator to the month and day (in this case a few days into October), centring Polaris in the hole in the middle and rotating the pointer attached to the centre to a specified circumpolar star, the arm indicates the time (in this case, 7 pm)
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Source Own work
Author Michael Daly

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current17:49, 30 September 2007Thumbnail for version as of 17:49, 30 September 2007652 × 892 (50 KB)Michael Daly~commonswiki (talk | contribs){{Information |Description=A nocturnal as costume jewellery. This is a functioning nocturnal, though only about 5 cm tall. It shows the month ring on the outside in brass. The inner disk shows the time and has an indicator on one edge. By setting the indi

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