Week 7

Friday The percolation test is carrying on: 1 hr 55 minutes to drop sufficiently. That's a blindingly fast rate of 1mm every 50 seconds or so. The average speed of a snail (Cornu aspersum) is 1.3 mm/s, and this is 0.2, or 6.5 times slower. The literature suggests a time of 24 seconds. Ha! Looks like … Continue reading Week 7