It
is thought that by the time of this dial all the old traditions of
obelisk, lectern and facet dials were long forgotten and so the mason
had to design along new lines (possibly based on nearby Polmaddie).
Thomas Ross wrote:
'It
may be described as a massive horizontal dial supporting an octagonal
column from which there jut out two tiers of radiating wings. These
wings are carved and sliced into innumerable figures and shapes, which
will be partly understood by referring to the drawing (below), in
which is also seen a space for a thermometer. There are dials on each
corner of the flat table, three of them carved on the stone, and the
fourth consisting of a metal plate. There are other contrivances on
the table, some of which is it believed served the purpose of a rain-gauge,
and are supposed to be connected with an opening in the base of the
dial. Winding round these dials is the inscription IT IS A LIGHT THING
FOR THE SHADOW TO GO DOWN TEN DEGREES; NAY, BUT LET THE SHADOW RETURN
BACKWARDS TEN DEGREES.'
I
had always thought the inscription a rather clever one but it was
only recently that I found out (thanks to the NASS) that it is a biblical
quotation - Second Kings Chapter 20.
8 And Hezekiah said unto Isaiah, What shall be the sign that the LORD
will heal me, and that I shall go up into the house of the LORD the
third day?
9 And Isaiah said,
This sign shalt thou have of the LORD, that the LORD will do the thing
that he hath spoken: shall the shadow go forward ten degrees, or go
back ten degrees?
10 And Hezekiah
answered, It is a light thing for the shadow to go down ten degrees:
nay, but let the shadow return backward ten degrees.
11
And Isaiah the prophet cried unto the LORD: and he brought the shadow
ten degrees backward, by which it had gone down in the dial of Ahaz.