On Thu, 23 Oct 2003 02:58:05 GMT, "Mark Browne"
wrote:


snip

Errr....why not just go buy a chunk of dryice, toss it in and close the
boat up?
snip
In a chicken breeding operation the people that sex chickens kill the males
by throwing them in a bucket with a chunk of dry ice - the vapor kills the
young chicks very effectively. Life is short and thankless for most male
chicks.


I've hooked a small pipe to a CO2 tank, and probed small containers of
grain. Screw the top back on, and see no weevil, hear no weevil, and
best yet, eat no weevil.

Small concentration are lethal to many, many critters.