Context: Some experiments on very resinous Longleaf Pine specimens indicate an increase in strength, due to the resin which increases the strength when dry. Such resin-saturated heartwood is called "fat lighter". Structures built of fat lighter are almost impervious to rot and termites; however they are very flammable. Stumps of old longleaf pines are often dug, split into small pieces and sold as kindling for fires. Stumps thus dug may actually remain a century or more since being cut. Spruce impregnated with crude resin and dried is also greatly increased in strength thereby.

Question: What type of tree has resin that makes it stronger when it dries?
Answer: Longleaf Pine

Question: What's the funny name for resin-saturated heartwood?
Answer: fat lighter

Question: What is fat lighter practically impervious to in addition to termites?
Answer: rot

Question: If spruce is shot full of crude resin and dried, which of its properties is increased?
Answer: strength

Question: Since it's highly flammable, what do people often use little pieces of longleaf pine tree stumps for?
Answer: kindling