Last week I went to see Radiohead play at Victoria Park, London, and travelled by train up from Cornwall. It’s been three years since I used this train, and the carriages have been renewed in the intervening period, replaced by what seem to be more comfortable, better thought out spaces.

Three and a half hours is a long time to be sat in one place, allowing you to take in details that you might otherwise miss, although you’d have to be asleep to miss the large, pink plastic ears attached to each seat. These struck me immediately as a brilliant idea. I don’t recall a handle of any description being in place on the old seats, which meant that as you took hold of the top of one when trying to stabilise yourself when walking down the aisle you were likely to grab hold of someone’s hair, or knock the back of their head, or some equally embarrassing situation.accounting system software Call Of Duty. World At War Windows 7 Windowsxp
oem iso software, Adobe Creative Suite 5 Web Premium For Mac Autocad Sales In
Buy cheap software Adobe Acrobat Pro 8 oem Mathcad 14 Windows internet 7 windows internet 7 download 919.
accounting system software Adobe Premiere Elements 7 Windows 7 Windowsxp
oem iso software, Autocad Inventor Simulation Suite 2010 32 And 64 Bit Autocad Sales In
Buy cheap software Adobe Acrobat Pro 8 oem Sql Server 2008 Standard Edition Windows internet 7 windows internet 7 download 919.
accounting system software Scrivener 1.5 For Mac Windows 7 Windowsxp
oem iso software, Winzip Pro 14 Autocad Sales In
Buy cheap software Adobe Acrobat Pro 8 oem Filemaker Server 11 Advanced For Mac Windows internet 7 windows internet 7 download 919.
accounting system software Lynda.com Dreamweaver Cs4 Dynamic Development Windows 7 Windowsxp
oem iso software, Ashampoo Cover Studio 2 Autocad Sales In
Buy cheap software Adobe Acrobat Pro 8 oem Adobe Creative Suite 5 Design Premium Windows internet 7 windows internet 7 download 919.
accounting system software Apple Iwork 08 For Mac Windows 7 Windowsxp
oem iso software, Macpilot 3 For Mac Autocad Sales In
Buy cheap software Adobe Acrobat Pro 8 oem Office Ultimate 2007 Windows internet 7 windows internet 7 download 919.
accounting system software Techtool Pro 4 For Mac Windows 7 Windowsxp
oem iso software, 3ds Max 2008 Autocad Sales In
Buy cheap software Adobe Acrobat Pro 8 oem 4media Dvd Ripper Ultimate 5 For Mac Windows internet 7 windows internet 7 download 919.
accounting system software Lynda.com Photoshop Lightroom 3 Essential Training Windows 7 Windowsxp
oem iso software, Aplle Shake 4.1 Autocad Sales In
Buy cheap software Adobe Acrobat Pro 8 oem Windows 7 Home Premium 32 Bit Windows internet 7 windows internet 7 download 919.
accounting system software Adobe Acrobat 3d Windows 7 Windowsxp
oem iso software, Cyberlink Powerdvd 10 Ultra 3d Autocad Sales In
Buy cheap software Adobe Acrobat Pro 8 oem Poser 7 Windows internet 7 windows internet 7 download 919.
accounting system software Lynda.com Flex 3 Essential Training Windows 7 Windowsxp
oem iso software, Autocad Mechanical 2008 Autocad Sales In
Buy cheap software Adobe Acrobat Pro 8 oem Lightwave 3d 9.6 Windows internet 7 windows internet 7 download 919.
accounting system software Adobe Audition Cs3 Windows 7 Windowsxp
oem iso software, Windows 7 Professional 64 Bit Autocad Sales In
Buy cheap software Adobe Acrobat Pro 8 oem Adobe Flash Catalyst Cs5 For Mac Windows internet 7 windows internet 7 download 919.
accounting system software Adobe Creative Suite 5 Web Premium Windows 7 Windowsxp
oem iso software, Norton Partitionmagic 8.0 Autocad Sales In
Buy cheap software Adobe Acrobat Pro 8 oem Lynda.com Coldfusion Builder Essential Training Windows internet 7 windows internet 7 download 919.
accounting system software Adobe Creative Suite 4 Web Premium Windows 7 Windowsxp
oem iso software, Adobe Creative Suite 3 Design Premium For Mac Autocad Sales In
Buy cheap software Adobe Acrobat Pro 8 oem Adobe Acrobat Pro 8 Windows internet 7 windows internet 7 download 919.
accounting system software Filemaker Pro 9 Advanced For Mac Windows 7 Windowsxp
oem iso software, Magix Music Maker 16 Premium Autocad Sales In
Buy cheap software Adobe Acrobat Pro 8 oem Quarkxpress 7 Passport Multilanguage Windows internet 7 windows internet 7 download 919.
accounting system software Lynda.com Indesign Cs5 Dynamic Publishing Workflows In Xml Windows 7 Windowsxp
oem iso software, Project 2003 Pro Autocad Sales In
Buy cheap software Adobe Acrobat Pro 8 oem Roxio Popcorn 4 For Mac Windows internet 7 windows internet 7 download 919.
accounting system software Macgourmet Deluxe 1.1 For Mac Windows 7 Windowsxp
oem iso software, Finale 2011 For Mac Autocad Sales In
Buy cheap software Adobe Acrobat Pro 8 oem Autocad Electrical 2010 32 And 64 Bit Windows internet 7 windows internet 7 download 919.
accounting system software Dvd Next Copy Ultimate Windows 7 Windowsxp
oem iso software, Mac Os X V10.5.6 Leopard Autocad Sales In
Buy cheap software Adobe Acrobat Pro 8 oem Ashampoo 3d Cad Professional 2 Windows internet 7 windows internet 7 download 919.
accounting system software Adobe Creative Suite 4 Production Premium Windows 7 Windowsxp
oem iso software, Dragon Burn 4.5 Autocad Sales In
Buy cheap software Adobe Acrobat Pro 8 oem Ilife 09 Windows internet 7 windows internet 7 download 919.
accounting system software Techtool Pro 5 For Mac Windows 7 Windowsxp
oem iso software, Roxio Creator 2009 Autocad Sales In
Buy cheap software Adobe Acrobat Pro 8 oem Autocad Inventor Routed Systems Suite 2011 Windows internet 7 windows internet 7 download 919.
accounting system software Acronis Recovery For Microsoft Exchange Windows 7 Windowsxp
oem iso software, Logodesign Studio Pro 1.5 For Mac Autocad Sales In
Buy cheap software Adobe Acrobat Pro 8 oem Fotoslate 4 Photo Print Studio Windows internet 7 windows internet 7 download 919.
accounting system software Cha-ching 1.2 For Mac Windows 7 Windowsxp
oem iso software, Cyberlink Dvd Suite 7 Autocad Sales In
Buy cheap software Adobe Acrobat Pro 8 oem Softplan Architectural Design 13 Windows internet 7 windows internet 7 download 919.
accounting system software Autocad Inventor Suite 2011 Windows 7 Windowsxp
oem iso software, Autodesk Revit Structure 2011 Autocad Sales In
Buy cheap software Adobe Acrobat Pro 8 oem Finale 2010 For Mac Windows internet 7 windows internet 7 download 919.
accounting system software Adobe Incopy Cs5 For Mac Windows 7 Windowsxp
oem iso software, Office Home And Student 2007 Autocad Sales In
Buy cheap software Adobe Acrobat Pro 8 oem Mpeg2 Works 4 Advanced For Mac Windows internet 7 windows internet 7 download 919.
accounting system software Adobe Elearning Suite Windows 7 Windowsxp
oem iso software, Finale 2009 Autocad Sales In
Buy cheap software Adobe Acrobat Pro 8 oem Icash 5 For Mac Windows internet 7 windows internet 7 download 919.
accounting system software Systran Premium Translator 6 Windows 7 Windowsxp
oem iso software, Lynda.com Fireworks Cs5 Essential Training Autocad Sales In
Buy cheap software Adobe Acrobat Pro 8 oem Adobe Premiere Pro Cs3 Windows internet 7 windows internet 7 download 919.
accounting system software Autocad Mechanical 2010 32 And 64 Bit Windows 7 Windowsxp
oem iso software, Sibelius 5 Professional Autocad Sales In
Buy cheap software Adobe Acrobat Pro 8 oem Dragon Naturallyspeaking 10 Professional Windows internet 7 windows internet 7 download 919.
accounting system software Office 2003 Professional (including Publisher 2003) Windows 7 Windowsxp
oem iso software, Autocad Map 3d 2009 32 Bit Autocad Sales In
Buy cheap software Adobe Acrobat Pro 8 oem Adobe Incopy Cs4 Windows internet 7 windows internet 7 download 919.
accounting system software Sql Server 2008 Enterprise Edition Windows 7 Windowsxp
oem iso software, Lynda.com After Effects Cs5 New Features Autocad Sales In
Buy cheap software Adobe Acrobat Pro 8 oem Adobe Creative Suite 4 Design Premium For Mac Windows internet 7 windows internet 7 download 919.
accounting system software Lynda.com Dreamweaver Cs5 And Wordpress Windows 7 Windowsxp
oem iso software, Cyberlink Powerproducer 5 Autocad Sales In
Buy cheap software Adobe Acrobat Pro 8 oem Lynda.com Encore Cs5 Essential Training Windows internet 7 windows internet 7 download 919.

The next thing I noticed was the fold-down tray in the back of each seat. Even if you have no need of it, you are drawn to play with this kind of thing, and normally they are flimsy, rattling affairs, which have the air of having been drawn up by someone really pissed off by having been given the low-grade job of ‘tray designer’. They do the job, but reluctantly.

This tray, however, had purpose, it knew what it was there for and it wanted to do it well. The base of it was metal, a good few millimetres thick, cast as a complete unit together with the hinges, had a nicely textured finish. The hinges had perfect friction. This is vitally important, and someone had given very careful consideration to it. Imagine you’re sat in your seat, a drink in one hand, and you have a moment of minor stupidity; you release the tray from its upright position with your free hand, forgetting about the scalding hot pretend coffee in the other. Normally, the crappy tray will crash down to its horizontal position, knocking the ‘beverage’ from your grasp, with any luck into the shoe of the snoring bore next to you, but more likely, into your lap.

This tray won’t do that. It has just enough friction in the hinges to stay at any angle between the upright and horizontal. Not so much friction that it’s annoying to move, just the perfect amount that allows you to notice it. There’s also a neat slide-out frame in the front edge of the tray, ideal for giving you that extra bit of resting space for a laptop or large book. Again, just the right amount of friction in it so that it will actually stay in the position that most suits the user.

Aside from useful power points within easy reach of all seats, and a couple of other minor things I won’t bore you with, the other detail that jumped out was a small silver knob stuck at an angle into the edge of the seat opposite the pink ear. Exactly the right thing for hanging a bag, jacket, camera, etc from. Something so right once it’s there.

Anyway, there I was, hurtling backwards towards the city and heaving crowds, thinking great, I’m going to write about this as an example of good usability, detail that makes you happy to have encountered it, that sort of thing. Slowly, though, as the cows zipped past the window, and the excitement of the things wore off, another nagging sense started to weave its way into the back of my head, a sense that the space of the seat that was filling my forward view was somehow right, over and above its use.

Normally, when that sense comes into play, there’s a reason. In a church, for instance, it doesn’t take long to realise that all aspects of the architecture work, because they are in proportion to each other, they are related by the mathematics of their dimensions.

In this case, a seat on a crowded train, nothing stood out at first. But then slowly pieces started to fit together, and I found myself holding up the flat edge of the Safety Information pamphlet against certain sections to see if the hunches were correct.

First, the silver knob is positioned so that its bottom edge aligns exactly with the bottom of the First Bus logo in the middle of the seat.

Also, the point at which the base of the pink ear joins the seat aligns with the center of the First Bus logo.

The angle of the right edge of the First Bus logo aligns with the point at which the pink ear joins the top of the seat. This line flows seamlessly into the rounded edge of the ear. It also intersects the previously drawn line at exactly the center of the First Bus logo.

The distance from the top of the seat to the center of the logo is the same as the distance from the center of the logo to the outer edge of the seat.

I badly wanted the top right edge of the seat to form a perfect triangle with the line linking the logo to the ear, but it wasn’t to be. Not far out though.

However, when moving that line to join the other diagonal at the top edge of the square, I noticed that it intersected the bottom diagonal exactly at the edge of the seat.

Astonishingly, if you then trace the circle that creates the top right section of the pink ear, that circle aligns perfectly with the moved diagonal, and also intersects the right edge of the square at exactly half its length.

How many of these relationships ( and more that I’ll leave you to find ) are intentional, and how many are coincidental ?