- Digging a shallow sump well with a shovel, a bucket and a wife
- or Call the professionals in
- some technical background for simpletons like me
- Holy Irish Wells
- Holy Welsh Well St. Dyfnog`s Llanrhaeadr, Denbigh North Wales [skip 4 mins]
- Holy Cornish Well [prev St.Piran] amazekernow!!
- With the hot spell we may anticipate some thunderstorms incommming when the weather gets a little more muggy. We lost our cordless phone the last time we had a lightning strike nearby, so it's handy to know how far the storm is from you. Knowing that sound travels at about
333.33333330-340 km/s (and light about 1000x faster) allows you count seconds between the flash and the rumble: if that time is 3s then strike was 1km away, if 6s then 2km etc. Unplug your modem if that time is less than 3 seconds - if it's not too late. You can also check to see if the storm is coming towards you or moving away.
- What I didn't know until now is that the speed of sound in air is a) variable and entirely dependent on temperature (not barometric pressure). 330km/s at 0oC and 345km/s at 25oC
- Erin Ersson air-activist is looking at some time in court
- Tadeshi Tokieda extends this life-skill if you want to go visiting Japan, Chile or California. The P = primary = pressure wave of an earthquake arrives D/6 seconds after it left the epicenter D km away. The S = secondary = shear wave comes at half the speed arriving after about D/3 seconds. Under this P=7s means S=14s means D=40km
- Making authentico medieval bricks
- Making an 18thC pizza oven
- Making the 21stC Achill Henge
Saturday, 28 July 2018