A tall, quiet stack of logs looks wrong to many campers, yet that neat tower, lit at the crown, is the most disciplined fire on the field. Built with the largest logs at the base, medium splits above, then kindling and tinder on top, a so-called top-down fire inverts the usual pyramid and flips the physics of a backyard blaze.Counterintuitive as it sounds, the cleaner party starts when flames move...More