This bonfire-to-go will ensure you have a cozy fire no matter what:
gabion cages - good for interior thermal mass
Real Life Hacks: How to make color fire
Tree Stump Removal Get rid of tree stumps by drilling holes in the stump and filling them with 100% Epsom salt. Follow with water, and wait. Live stumps may take as long as a month to decay, and start to decompose all by themselves.
Bipolar transistor construction ~ Electrical Engineering World