On Fri, 07 Nov 2003 07:05:24 GMT, "John E. Carty"
wrote:

:
:"REEI2002" wrote in message
...
: Try Nitrogen instead of air, aviation type rubber tubes leak molecular
:air.
: Nitrogen molecules are larger.
:
:Considering air is 77% Nitrogen, how much difference does this really make
:when it comes to seepage of this kind? :-)

And almost all the rest - Oxygen (21%, atomic weight 32) and Argon
(.94%, atomic weight 40) and Carbon Dioxide (.03%, atomic weight 38)
have larger molecules than Nitrogen (atomic weight, 28)