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Post details Post   (Contract pics)
Well, Claude Hoppe.. by weedavie   (Show all posts)
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Colin Murphy
2008-12-02 10:39:12
"Schiehallion" from Colin Murphy Contract pics
Picture: Schiehallion (Contract pics)

Contour lines, physics byproduct
Back in the distant year of 1981, a flatmate of mine in Edinburgh, suggested that we kill a summer’s Sunday by ‘climbing a mountain’. With nothing else to do, we set off for God-knows-where in his banger of a car and I duly trudged along in agonised silence behind him, ill-equipped and totally unfit as we headed up Schiehallion (1083m in Perth & Kinross) – my first ever hillwalking experience. By co-incidence I recently came across the name Schiehallion when reading Bill Bryson’s ‘A short history of everything’. In 1774, the mountain had been selected by a physicist Nevil Maskelyne as an ideal one to conduct an experiment to determine the universal gravitional constant – if you hang a plumb line near a mountain the gravitational force will pull the line at a tiny but measurable angle towards its mass. All you need to do is measure the mass of the mountain and bob’s your uncle, the gravitational constant! Maskelyne and a mathematician called Hutton spent months taking countless measurements of Schiehallion to determine its precise shape. But the jumble of numbers was so confusing they could make little use of them – until Hutton realised that his job would be made easier if he joined the points of equal height. When he did, he realised that he’d accidentally discovered a way of accurately mapping the landscape – contour lines. Within a few years the system was adopted as a standard among cartographers the world over and it has certainly stopped me from walking over a few cliffs over the years. Incidentally their original gravitational constant experiment was a success and was actually repeated by a group of scientists in 2005, with pretty much the same results!
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Summit Comment
An Cnoc Fada: The majesty of the Poisoned Glen in the snow
mcrtchly 15 hours ago.
A snowy day gives a different perspective on the Poisoned Glen and Crockfadda. This photo was taken with a 500mm lens at a distance of 1.5km from the Scared Heart Church and 8km from the the Poiso...

  
Summit Comment
Tomies Mountain: Light on Tomies and Purple
davsheen 19 hours ago.
Tomies and Purple in the Light from Muckross

  
Summit Comment
Derrygarriff: Free as a bird
Colin Murphy a week ago.
We were lucky to see a white tailed eagle gliding gracefully over Eirk Lough before before coming to rest on a rock, which provided the opportunity to capture a pic of the rarely seen bird of prey...

Track
The Beara-Breifne Way Day 6
mlmoroneybb 4 days ago.
Thanks to all for making the weekends on the Beara-Breifne Way so special. We have completed 187Km in 7 Day?s walking walk, Len: 30.3km, Climb: 781m, Area: Paps/Derrynasaggart (Ireland)

  
Forum: General
Enjoy your trip
BleckCra 3 days ago.
The first flurry of snow here in Armagh. A biting wind. Antenna whiskers taste the chill air and the prospect of picture postcard winter days. In no time at all, the Cairngorm Mountain Rescue will...

  
Summit Comment
Foardal: Beyond a shadow of a doubt
Colin Murphy a week ago.
The French writer Maupassant used to say he had lunch in the Eiffel Tower every day because it was the only place in Paris that he couldn't see the thing. A similar view might be taken of Foardal,...

Track
The Beara-Breifne Way Day7
mlmoroneybb 4 days ago.
On Sunday, we were not attacked by the MacCarthys of Drishane Castle but started our walk on the O?Keefe Booning Castl walk, Len: 27.7km, Climb: 362m, Area: Paps/Derrynasaggart (Ireland)

  
Track
The Beara-Breifne Way Day5
mlmoroneybb 4 days ago.
Day 5 we set out for Ballyvourney where some of us put our cupla focail to good use. Along this trail we came across man walk, Len: 23.4km, Climb: 483m, Area: Shehy/Knockboy (Ireland)

  
Forum: General
Hillocks
BleckCra 5 days ago.
Simon. Himself is the well known to some, Bernard Hill. Less well known of course are hills to do with ants, except to some. Keep er lit though. At least some sort of discussion and of course only...

Summit Summary
Foardal: Simple approach from NW
Collaborative entry Last edit by: Colin Murphy a week ago.
If you want to do this in isolation, the simplest route is from the car park at V882790, and then heading SE directly up the heathery slope for 1km. The summit itself is a broad heathery mound.

  
Track
The Beara-Breifne Way Day4
mlmoroneybb 4 days ago.
The Saturday trek started in the scenic village of Glengarriff. From here a short boat trip brought some of our members... walk, Len: 27.5km, Climb: 783m, Area: Shehy/Knockboy (Ireland) Foilastookeen

  
Summit Summary
Derrygarriff: Fine summit, easily reached.
Collaborative entry Last edit by: Colin Murphy a week ago.
There are access issues around Moll's Gap, so suggest starting at car park at V882790 and proceeding up the heathery slopes to Foardal - about 1km to the SE, before walking the 1.5km to the SW to ...


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