[Terrapreta] "simple" charcoal retort

[andrew]

On Tuesday 29 April 2008 14:48, folke Günther wrote:
> Besides: I use the nomenclature that a 'retort' is a charcoal kiln
> that is designed to not emit other gasses than CO2. Do you agree,
> or should other words be used?

I generally differentiate between a retort and a kiln by whether 
there is a fire (oxidation) within the containment or not, yours 
looks like a retort to me as the fire takes place outside the 
charcoal container.

AJH