The Blagrave Dial
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The Blagrave Dial is made of solid bronze. The cast elements which form the cradle to the dial are sculpted to mimic the mythical creatures supporting the sphere, although with a slightly less menacing demeanour.
At the centre of the sphere is a bronze globe with relief land masses depicting the rudimentary understanding of the continents of that time. The land, in burnished bronze, is surrounded by seas that are oxidized to a blue-green verdigris.
Among the other original features are a calibrated scale of time and an azimuth correction scale which allows the dial to be used at any latitude.
![Original design of the Mathematical Jewel by John Blagrave in the sixteenth century](/images/sundials/blagrave/mathematical_jewel.png)