{"id":17572,"date":"2025-01-16T09:41:53","date_gmt":"2025-01-16T09:41:53","guid":{"rendered":"https:\/\/crouchrarebooks.com\/browse\/the-only-known-example-of-the-only-scientific-instrument-produced-by-john-seller\/"},"modified":"2025-03-18T17:20:50","modified_gmt":"2025-03-18T17:20:50","slug":"the-only-known-example-of-the-only-scientific-instrument-produced-by-john-seller","status":"publish","type":"product","link":"https:\/\/crouchrarebooks.com\/zh-hans\/browse\/the-only-known-example-of-the-only-scientific-instrument-produced-by-john-seller\/","title":{"rendered":"The only known example of the only scientific instrument produced by John Seller"},"content":{"rendered":"<p>200mm (8 inch) diameter double horizontal brass sundial, octagonal form, the corners pierced for screws, engraved plate for solar declination and hours, gnomon underpinned at centre, bearing later signature of John Seller, over-signed in the chapter ring &#8220;Jon. 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