On Thu, 7 Dec 2006 13:12:43 -0600 (CST), Peter Singfield wrote: >So -- envision AD's device on a slightly larger scale. The device as originally propounded by Yury was on a much larger scale http://www.repp.org/discussiongroups/resources/stoves/Yudkevitch/charcoal/ekolon.html AJH