Ring Dial
A Ring Dial was a cutting edge scientific instrument in its time, which is about 500 years ago!
A Ring Dial - or two-ring universal equinoctial ring dial to give it its full name - was a cutting edge scientific instrument in its time, which is about 500 years ago! Essentially it is a type of sundial that allows you to tell the time wherever you are, so long as the sun is shining. Originally developed in the early 17th century by the English mathematician William Oughtred, it was a development of an earlier instrument, the astronomer's ring, which was used for measuring the altitude of stars and also terrestrial objects.
You need to know your latitude, so this is the first adjustment that you need to make.
Secondly you need to set the date using the sliding section in the middle.
Then you rotate the inner ring until it won't turn any more. Suspend the ring dial by the cord, such that the sun shines through the pinhole in the middle, and hits the centre of the inner ring. From here you can read off the time. When you have finished, you can fold the ring dial flat again. The ring dial does not allow for the 1 hour change in summer time, so you need to factor that in to your calculations. It can work in any latitude from 20 degrees to 75 degrees, in either hemisphere. What is clever is that, unlike a normal sundial that needs to be aligned and requires you to know the exact direction of north, the ring dial does not need this information.
Needs no batteries!
This modern replica is made of solid brass, and comes in a small cardboard presentation box, together with instructions. The dial is 6cm across.
Made in EU
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Shipping
We aim to ship orders within 48 hours.
For UK deliveries, we use DHL Parcel (UK) and EVRI.
For deliveries to Europe we offer a choice of DPD or DHL.
For deliveries outside Europe, we ship by DHL.
Our warehouse works Monday to Friday only. If we receive your order by 10am then we aim to ship the same day or the next day, depending on how busy the warehouse is. On the day your order ships, the warehouse will send you your tracking number by e-mail at 7pm UK time. The delivery time to reach you will depend on the shipping option you have chosen.
Returns
We will accept items that you wish to return, within 30 days of placing the order. You are responsible for the cost of shipping the item back to us, and it must be in saleable condition. We will refund you the cost of the item. Please let us know if you wish to return an item before you send it.
If the item is faulty, please let us know, and we will ship a replacement or refund your money, as you wish.
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