Posted by Roger Wardale on August 12, 2014 at 13:30:20 user RogerW.
In Reply to: Re: The Billies' adder posted by Roger Wardale on August 12, 2014 at 03:20:01:
An interesting article mentioning adders:
http://www.gowercharcoal.co.uk/pages/charcoalproduction.php