On Fri, Nov 4, 2011 at 10:05 PM, Terry Blanton <hohlr...@gmail.com> wrote: > On Fri, Nov 4, 2011 at 9:50 PM, Jed Rothwell <jedrothw...@gmail.com> wrote: >> Here is an interesting comment in the Wikipedia discussion from someone who >> claims he or she was present at the Oct. 6 test. Does anyone know what >> "kettle stone" means? Deposits from evaporated water? > > Yes, also called boiler scale: > > http://www.magnumarchive.com/c/iconographic-encyclopedia-volume-5/Storage-Water-Its-Purification.html
http://www.eutechinst.com/techtips/tech-tips45.htm T
