When homesteaders first settled in Whatcom county many of the trees were too large to be easily cut down with axe and crosscut saws and the logs too big to move. So they had a method of boring intersecting holes in the trunk that were then packed with vine maple coals, a week or so later the trunk would burn through enough for the tree to fall. They would then burn the rest on the ground. Seems like a waste to us now but they were homesteaders just trying to clear land for farming...
On another note, while I was in college studying forestry we toured several of Weyrhouser mills in Everett, Mill B was still in operation at that time was the oldest, it had been designed for cutting logs that were a minimum size of 6 feet in diameter! That day they were cutting 3 foot logs, they looked like tooth picks going through that headsaw!