{"product_id":"rare-boxwood-brass-preston-folding-ruler-square-copy-copy","title":"RARE \"I. ROUTLEDGE ENGINEER\" 2 FOLD SLIDE RULE BY I. BUCK NEWGATE","description":"\u003cp\u003eExcellent condition and highly likely ca 1825. Incredible detail with 100s of stamps. Stamped both \"I ROUTLEDGE ENGINEER BOLTON\" and \"J BUCK 6 NEWGATE ST \u0026amp; WATERLOO RD LAMBETH LONDON\". Buck and Routledge were contemporaries so without a doubt Routledge commissioned Buck to produce his rule design. Based on the address at 6 Newgate I would surmise this is one on Buck's very earliest offerings. He worked starting in 1821 and moved to 124 Newgate in 1834.\u003c\/p\u003e\n\u003cp\u003eFrom The Smithsonian website: \"\u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eThis form of slide rule was invented by Joshua Routledge, a seller of iron goods, in 1808 or 1809. He discussed it in the 1813 (4th) edition of \u003c\/span\u003e\u003ci\u003eInstructions for the Engineer's Improved Sliding Rule\u003c\/i\u003e\u003cspan\u003e....\"\u003c\/span\u003e\u003c\/p\u003e","brand":"Ted Dawson Antique Tools","offers":[{"title":"Default Title","offer_id":54043346305329,"sku":"8757","price":285.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0302\/2618\/6377\/files\/DSC00036_ccd038bb-807b-4672-b51e-60a066faa63e.jpg?v=1777577958","url":"https:\/\/teddawsonantiquetools.com\/products\/rare-boxwood-brass-preston-folding-ruler-square-copy-copy","provider":"Ted Dawson Antique Tools","version":"1.0","type":"link"}