On Thu, 13 Oct 1994, J. Walker wrote:
> while and let the gas bleed off.  other folks i know always put a rag over
> the top of the battery ... i've never quite understood the reasoning behind
> this, but they always do it 'to prevent explosions'.  (all the hydrogen gas
> that i ever knew would go right through a rag).

Actually, the reason for the rag is so that when the battery explodes, the 
acids are contained to some degree.  

--
Gerry
Gerald Skerbitz <gsker@med.umn.edu> U of MN Med School Admin 6-5379