In message
Hugh Newbury wrote:

On 29/12/11 14:13, Michael Bell wrote:

...

The next most obvious thing to do is to go back to school chemistry
and use Kipp's apparatus, that involves limestone, not a problem, and
acid, which might be a problem.

Yeast?

Hugh

Yes, a possibility. Steady production at biological temperatures.

Another possibility is Alka-Selzer cartridges. Or have I got the name
right? Those capsules which produce a sparkling drink?

Michael Bell



--