On Wed, 9 Jan 2008 20:07:07 -0500, "garigue"
wrote:



Turning the jar slowly in the lathe I
gradually applied heat from a small hobby gas
torch to the score line increasing
the heat slowly until ping! the end fell off. 7.
Then I dressed off the end with
wet and dry.

Good luck,

Grant Erwin


Hello Erwin ...boy you guys are jogging my memory ....I used a glass cutter
to scribe a line on the bottle circumference on a wooden jig I made ....
Then I used a bent rod with a weight on it that went into the bottle which
then was tapped about the scribed line from inside the bottle ..... this
resulted is some nice separation and in some cases a handful of glass shards
...gloves of course .... then I tried using a string soaked in alcohol tied
at the scribe line ...lit it then ping ...nice separation ..... seemingly I
got the string flame system from an old Pop Mechanics ....

Take care Erwin ..... Tom in Belle Vernon Pa

IIRC from ~60 years back, the method was to wrap a cord once and a
half around the bottle, then pull it back and forth to heat the glass.
After about five minutes, dunk the bottle into cold water. SNAP!
Gerry :-)}
London, Canada