On Sun, 3 Dec 2017 09:24:48 -0800 (PST), wrote:

On Sunday, 3 December 2017 15:00:55 UTC, Geo wrote:

No - was my own idea. Used to boil U2 batteries too to get the carbon
rods out to make arc lamps - can still see.

I'm puzzled that you'd need to boil them. I just took the rods out. (I've no memory of what size the cells were.)


Maybe didn't /need/ to - but it was more interesting to see the rods
ejected slowly under their own "steam".