You never notice it in the pressure canner, putting them in the BWB you hear a "tink" and the bottom falls off. The ones I've lost in the pressure canner only lost the bottom too, seems that's where they fail. Blowing the jar is just what I call it, hate to waste all that food. George Craig Watts wrote: > > Craig Watts > kingdomm@worldnet.att.net > > ---------- > From: George Shirley <gshirl@bellsouth.net> > To: Gardeners List <gardeners@globalgarden.com> > Subject: [gardeners] Saturday in the garden > Date: Saturday, July 14, 2001 12:25 PM > > Was going > to be 12 pints but one of my 40 year old pint jar blew the bottom out. Lost > a > quart jar that way a couple of weeks ago putting up 10 quarts of dill > spears. > > Was wondering how exciting blowing a jar was and how often it > occured<sitting looking at the pressure canner....We put up 7 quarts and 5 > pints spagetti sause today.