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On 27/05/2014 17:29, John Davis wrote:
Fellow diallists,
TV viewers in the UK
may be looking at the BBC2 series of 'Springwatch' programmes,
with another 11 hours of nature-watching still to come. It is
being filmed from the RSPB Minsmere (Suffolk) nature reserve.
As the cameras wander
around, look out for a visitor attraction on the reserve which
appears like a series of wooden totem poles with carved oak
bird sculptures on top and hand-cranked sound systems giving
their calls. What the commentators may not tell you is that
these posts constitute part of a simple sundial. A central
post with a carved wooden ball on top acts the nodus and the
other posts are positioned so that on designated dates/times,
the ball's shadow will fall at the foot of the post.
As we've had 40mm of
rain here today, the dial hasn't been in operation!
John
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Rain this weekend at the football in London, tennis in Paris,
baseball in Atlanta and St. Louis, and cycling in Italy - global
wetting in operation !
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Richard Mallett
Eaton Bray, Dunstable
South Beds. UK
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