{"product_id":"dipleidoscope-f3431","title":"Dipleidoscope","description":"Dipleidoscope dial for latitude 52 north. It has a square base set on three small feet, one of which is also a levelling screw. A rusty steel compass needle is set in a glazed rectangular box along one edge. The needle can be locked in position by an arm operated by a lever on the side of the box. This box has a degree scale at one end, divided anticlockwise [0]-[40]. The fact that 20 is in the middle might suggest that this was the magnetic variation at the time of production. There is also a bubble level on the base.\u003cbr\u003e\u003cbr\u003eThe semicircular hour arc is inclined at an angle to the base. It is numbered clockwise IX-XII, I-III. An inclined brass pillar set at the centre of the hour arc supports the prism and mirror attachment and can be turned and locked in position. The attachment consists of a squat cylinder, in the upper face of which is a blue glass aperture behind which are set two mirrors. The number '1577' is scratched on the underside of the base; this is probably the serial number of the instrument. Such a serial number suggests that it was made in the 1850s. \u003cbr\u003eEdward John Dent \u0026amp; Co.","brand":"prodigi","offers":[{"title":"Fine art poster \/ XS: 20 x 15cm \/ none","offer_id":57017026543998,"sku":"GLOBAL-FAP-6X8","price":22.95,"currency_code":"GBP","in_stock":true},{"title":"Fine art poster \/ S: 40 x 30cm \/ none","offer_id":1945973391404,"sku":"GLOBAL-FAP-12X16","price":28.95,"currency_code":"GBP","in_stock":true},{"title":"Fine art poster \/ M: 60 x 45cm \/ none","offer_id":57017026576766,"sku":"GLOBAL-FAP-18X24","price":38.95,"currency_code":"GBP","in_stock":true},{"title":"Fine art poster \/ L: 80 x 60cm \/ none","offer_id":57017026609534,"sku":"GLOBAL-FAP-24X32","price":54.95,"currency_code":"GBP","in_stock":true},{"title":"Fine art poster \/ XL: 100 x 75cm \/ none","offer_id":57017026642302,"sku":"GLOBAL-FAP-30X40","price":69.95,"currency_code":"GBP","in_stock":true},{"title":"Framed picture \/ S: 36 x 28cm \/ none","offer_id":57017026675070,"sku":"MUS-CFPM-11X14","price":59.95,"currency_code":"GBP","in_stock":true},{"title":"Framed picture \/ M: 50 x 40cm \/ none","offer_id":1945973686316,"sku":"MUS-CFPM-16X20","price":79.95,"currency_code":"GBP","in_stock":true},{"title":"Framed picture \/ L: 80 x 60cm \/ none","offer_id":57017026707838,"sku":"MUS-CFPM-24X32","price":119.95,"currency_code":"GBP","in_stock":true},{"title":"Framed picture \/ XL: 100 x 75cm \/ none","offer_id":57017026740606,"sku":"MUS-CFPM-30X40","price":159.95,"currency_code":"GBP","in_stock":true},{"title":"Postcard \/ Standard: 6 x 4in \/ Single","offer_id":57017026773374,"sku":"GLOBAL-POST-MOH-6X4","price":1.95,"currency_code":"GBP","in_stock":true},{"title":"Postcard \/ Standard: 6 x 4in \/ 10-pack","offer_id":57017026806142,"sku":"GLOBAL-POST-MOH-6X4-10","price":14.95,"currency_code":"GBP","in_stock":true},{"title":"Postcard \/ Standard: 6 x 4in \/ 20-pack","offer_id":57017026838910,"sku":"GLOBAL-POST-MOH-6X4-20","price":24.95,"currency_code":"GBP","in_stock":true},{"title":"Postcard \/ Large: 7 x 5in \/ Single","offer_id":57017026871678,"sku":"GLOBAL-POST-MOH-7X5","price":2.95,"currency_code":"GBP","in_stock":true},{"title":"Postcard \/ Large: 7 x 5in \/ 10-pack","offer_id":57017026904446,"sku":"GLOBAL-POST-MOH-7X5-10","price":19.95,"currency_code":"GBP","in_stock":true},{"title":"Postcard \/ Large: 7 x 5in \/ 20-pack","offer_id":57017026937214,"sku":"GLOBAL-POST-MOH-7X5-20","price":29.95,"currency_code":"GBP","in_stock":true},{"title":"Greetings card \/ Standard: 6 x 4in \/ Single","offer_id":57017026969982,"sku":"GLOBAL-GRE-MOH-6X4-BLA","price":2.5,"currency_code":"GBP","in_stock":true},{"title":"Greetings card \/ Standard: 6 x 4in \/ 10-pack","offer_id":57017027002750,"sku":"GLOBAL-GRE-MOH-6X4-BLA-10","price":15.95,"currency_code":"GBP","in_stock":true},{"title":"Greetings card \/ Standard: 6 x 4in \/ 20-pack","offer_id":57017027035518,"sku":"GLOBAL-GRE-MOH-6X4-BLA-20","price":26.95,"currency_code":"GBP","in_stock":true},{"title":"Greetings card \/ Large: 7 x 5in \/ Single","offer_id":57017027068286,"sku":"GLOBAL-GRE-MOH-7X5-BLA","price":3.5,"currency_code":"GBP","in_stock":true},{"title":"Greetings card \/ Large: 7 x 5in \/ 10-pack","offer_id":57017027101054,"sku":"GLOBAL-GRE-MOH-7X5-BLA-10","price":19.95,"currency_code":"GBP","in_stock":true},{"title":"Greetings card \/ Large: 7 x 5in \/ 20-pack","offer_id":57017027133822,"sku":"GLOBAL-GRE-MOH-7X5-BLA-20","price":33.95,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2785\/2654\/files\/f3431.jpg?v=1772637202","url":"https:\/\/prints.rmg.co.uk\/products\/dipleidoscope-f3431","provider":"Royal Museums Greenwich prints","version":"1.0","type":"link"}