Directions for making an universal meridian dial, capable of being set to any latitude; which shall give the mean solar time of noon, by inspection, without any calculation whatsoever / By Francis Wollaston.

  • Francis Wollaston
Date:
1793

Licence: Public Domain Mark

Credit: Directions for making an universal meridian dial, capable of being set to any latitude; which shall give the mean solar time of noon, by inspection, without any calculation whatsoever / By Francis Wollaston. Source: Wellcome Collection.

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