Several years ago I made some of these, and only just now got around to trying one out. Basically what it is is this. A tuna fish can filled with cardboard, and paraffin. To make one use a clean empty tuna can . Next get some cardboard, and cut it into long strips that are about an 1/8 inch shorter than the can is deep. Wind the cardboard up( like a clock spring) and put it into the can, totally filling it. Stick some string down into the card board to act as a starter wick. I plan to use a few starter wicks in each if I make more of these. Next, melt,and pour the paraffin into the card board filled can.
The one I burned last night did ok. It only had one starter wick that was located in the center. When it was lit it took about ten minuets for it to get burning all around. The burn was pretty clean,not too smokey, the flame was about 8 inches high. It burned for about an hour.
I think that this has it's place in ones preparations.
Regards, Mark