If anyone is interested in the old country trades dying out. Go up onto Ringinglow road and watch a Dry Stone - Waller in action, hes working just down from the Norfolk Arms on the same side of the road, take your children along to see a dying trade and then try to work out just how long it took to build all the walls in the immediate area ? years and years!

I believe there are regular classes and demonstrations of dry stone walling in the Peak District, so it wouldn't be hard to see. It is a craft that is still well and truly alive.

If anyone is interested in the old country trades dying out. Go up onto Ringinglow road and watch a Dry Stone - Waller in action, hes working just down from the Norfolk Arms on the same side of the road, take your children along to see a dying trade and then try to work out just how long it took to build all the walls in the immediate area ? years and years!

I'm more interested in the processes occurring when emulsion paint dries. Did you know that initially spherical beads of polymer based paint are suspended in water? As the water dries the paint spheres come into contact and pack into an array approximating that of a cubic close packed lattice. As the paint dries further the contact area between the paint balls increases, until all of the void volume has been lost. At this point each of the original paint balls will have adopted a dodecahedral close packing shape called a 'Kelvin solid', after Lord Kelvin, who first predicted the shape from studies of bubble packing in three dimensions.