this is called a swedish flame. make your cuts like you're cutting cake. leave about 6 inches at the base. throw some fuel oil in there. (about a cap full.) it burns up to two to three hours.
Build a Rocket Stove- One of the best and most efficient ways to cook in an emergency!
Rocket stove in use - everyone needs to know how to build/use one of these for "those" times when there's no other way to cook.
Check out this great stove you can put together with two cans and some wire for emergencies. www.SodaPopAve.com