[Terrapreta] Earthen Kiln Conjecture

[Greg and April]

Ever look in the bottom of a bag a charcoal?

You'll find lot's of smalls & fines just from the char rubbing against it's 
self.

To a certain degree, it's almost imposable to prevent.


Greg H.


----- Original Message ----- 
From: "MFH" <mfh01 at bigpond.net.au>
To: "'Kevin Chisholm'" <kchisholm at ca.inter.net>
Cc: "'terra pretta group'" <terrapreta at bioenergylists.org>
Sent: Wednesday, April 16, 2008 18:20
Subject: Re: [Terrapreta] Earthen Kiln Conjecture


> Kevin
>
>
SNIP

> How were chunks of charcoal reduced to 2mm pieces, by multiples of tonnes,
> in the absence of iron or steel.?
>