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The Ireland Map fo.. by pazapas   (Show all posts)
Padodes has a Gene.. by wicklore   (Show all posts)
These are walks b.. by terree   (Show all posts)
To Captain Whereto.. by Bleck Cra   (Show all posts)
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!
As a footnote to t.. by pdtempan   (Show all posts)
I spent over an ho.. by CaptainVertigo   (Show all posts)
Climbed this mount.. by korff o'barbunk   (Show all posts)


RECENT CONTRIBUTIONS 1 2 3 .. 15 Next page >>
Summit Comment
Knockowen: October 2016
davsheen 3 days ago.
View of the impressive Glanrastel valley from the side of Knockowen

  
Summit Comment
Cupidstown Hill: Enhance this with a visit to Oughterard
Bunsen7 2 days ago.
Yes, perhaps this is not a very noteworthy hill. Cupidstown and Saggart Hill represent largely forest topped outliers of the Dublin/Wicklow range split from higher summits to the East by the N81. ...

  
Summit Comment
Cloghernagh: Picture
davsheen 3 days ago.
Cloghernagh Walk Nov 2016

Track
Near South Cork (Ireland)
sean_debarra 3 days ago.
walk, Len: 0.8km, Climb: 15m, Area: South Cork (Ireland)

  
Track
Route to Claggan NE Top
Onzy 4 days ago.
walk, Len: 8.0km, Climb: 2m, Area: Claggan Mountain NE Top, North Mayo (Ireland...

  
Summit Summary
Robber's Pass Hill: Minor heathery lump. Overcivilised and underwhelming.
Collaborative entry Last edit by: simon3 a week ago.
This oddly named hill is more a very minor heathery bump incorporated into the system of tracks laid out by the Wicklow Mountains National Park. It can be reached from any of the western car-parks...

Summit Comment
Farbreague: from Arderin
ewen a week ago.
Walked to Farbreague from Arderin. There is a track that some kind soul has marked with sticks and ribbon. When I say track, it is really a worn down trough in the bog.The multicoloured pipe at th...

  
Track
Slievemore Circuit
Onzy 4 days ago.
Route over Slievemore descending over rough grouns to the SE for variety. walk, Len: 8.1km, Climb: 639m, Area: Slievemore, Achill/Corraun (Ireland) Sliev...

  
Summit Comment
Tonelagee: Fore!!!
ewen a week ago.
Did from the Wicklow gap car park following track 2378.This starts immediately opposite the top entrance to the car park next to the main road. 5 days before there had been snow but now the path w...

Summit Comment
Brandon Hill: Grand on Brandon!
MountainBoy a week ago.
Me and my Dad climbed this from the farm track off the Graiguenamanagh-Instioge road on 26/11/16. Right after we got out of the car, we were faced with the dilemma of whether to go straight ahead ...

  
Track
Knockchree
David-Guenot 2 weeks ago.
An easy one to bag, but a gate/fence to cross at the top and some cows in the field (hopefully no bull), so it may be ... walk, Len: 3.6km, Climb: 127m, Area: Knockchree, Mourne Mountains (Ireland) K

  
Summit Comment
Croaghmoyle: Easy walk up to great views
Fergal Meath a week ago.
Low lying cloud/mist/fog discouraged me from putting the effort into going up Nephin today. On the way home I parked at the start of the Croaghmoyle service road and followed it past a wind turbin...


RECENT CONTRIBUTIONS 1 2 3 .. 15 Next page >>