Keeps on Ticking

http://www.motherearthnews.com/renewable-energy/keeps-on-ticking.aspx

bedol2Away back in September, six months ago, I reported on an unusual clock that uses just water and salt to run on. I thought it was a unique product that would be fun to tell you all about, but figured that the Bedol water clock would probably be in need of constant fussing – I was very wrong!

Until this week, the clock lost no time what-so-ever, and because it is a sealed system, it also didn’t lose water due to evaporation. I added a teaspoon of salt on Wednesday and the clock is right back on track. Just one teaspoon of salt for six months of reliable operation.

It doesn’t get much more energy efficient than that!!