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Could weedavie giv.. by Claude Hopper   (Show all posts)
MV is a fantastic .. by brenno   (Show all posts)
Colin Murphy
2008-12-02 10:39:12
"Schiehallion" from Colin Murphy Expand pics
Schiehallion (Expand 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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User profile
ewen
ewen 9 hours ago.
Now living furth of Scotland and getting to know the Irish hills. If you come across a Scottish hill Walker with dodgy knees and walking sedately, stop and say hello.

  
Summit Comment
Knockroe: OMG - I forget to check the MV page!
Pepe 9 hours ago.
Decided to make a day out of a Dublin-Waterford drive, despite low-hanging cloud. Knockroe wore a misty white cap as I glanced up from the Sculloge Gap carpark. Planning my attack (so I thought), ...

  
Summit Comment
Gortrumnagh: Drive or Walk
sandman a day ago.
The gravel track at L6133851903 will bring you up to the second quarry workings allowing you to park at L6213651955 and enter the open hillside via a gate just inside the quarry to the left. No si...

Summit Comment
Ballynew: Coastal Hill
sandman a day ago.
Park at L6231659377 opposite a very modern designed house and follow the non tared track and as it turns right go straight up hill thru an old overgrown trail still used by some cattle on there ow...

  
Summit Comment
Murneen: Coastal Hill
sandman a day ago.
With views over Cleggan Harbour this small coastal hill has no access issues. Enter via the access road for the Cleggan Group Water Reservoir at L5989857914 and continue up past the compound and w...

  
Summit Comment
Streamstown East: Coastal Hill
sandman a day ago.
Parking at L6466853750 take the small farm track in by the side of the forest crossing a double gate which was padlocked hand rail the forest on your left and thru a second gate to the summit area...

Summit Summary
Bleantasour Mountain: A boggy but short ascent route
Collaborative entry Last edit by: simon3 a day ago.
Go to the forest entrance at S22452 09704. there is room here for a few cars.Walk down the forest track, crossing a ford and follow the track until you can see open ground.Walk south along the edg...

  
Track
A handy way up two western Monavulaghs.
simon3 a day ago.
Easy access to the ridge.Improved RouteUsing the hard won experience of others and new forest roads we found a relati... walk, Len: 6.5km, Climb: 263m, Area: Bleantasour Mountain, Comeragh Mountains

  
Summit Summary
Milk Hill: Carry on bagging
Collaborative entry Last edit by: simon3 a day ago.
Go to the forest entrance at S22452 09704. there is room here for a few cars.Walk down the forest track, crossing a ford and follow the track until you can see open ground.Walk uphill to the summi...

User profile
dr_banuska
dr_banuska 2 days ago.
Tyrone based hiker who walks all over but especially in my locals, the Sperrins. Completed the County High Points in 2016 (after 8 years!). Enjoy longer trails as well e.g. did the Moyle Way (Co. ...

  
Summit Comment
Seefin: Fine day spoilt by Scramblers
ewen a day ago.
Started at the Coillte gate at 068145 where there is parking for 2 cars. I then followed the forest road around until the first turn off to the left. This takes you along to the fire break/path at...

  
Forum: General
Local 97
marymac 3 days ago.
An abstract Artist, Charles Shaw, said "Real happiness consists in not what we actually accomplish, but what we think we accomplish." I moved house. So my Local 100 changed. The new list includes ...


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