Fire Logs. It is well known that wax mixed with sawdust makes a fine incendiary. It is not as well known that commercially available pressed-wood "fire logs" are composed of exactly the same materials and can be easily modified for use as incendiaries. Buy the cheapest ones available. The only differences between them are the chemicals that the high-priced ones have to make their flames prettier and the type of wood used (some use cedar for frag- rance). For incendiary purposes, how the fire looks or smells is of no consequence. The logs generally come in 3- to 6-pound sizes. Remove the wrapper and saw them into 1-pound chunks. They saw easily, rather like cutting a large Tootsie Roll. Place each chunk in a paper lunch sack and heat in a micro- wave oven for 3 to 5 minutes on 50 percent power (defrost setting) until the log breaks apart. Time will vary with different ovens. If a microwave is not available, heat a regular oven to 250 degrees for 10 minutes, then turn it off. Place 1 sack at a time in the oven and warm until the log can be easily broken apart, generally about 10 minutes. Watch the sack care- fully and remove it from oven if it begins to smoke. Break up the chunk until it forms a loose, coarse mixture resembling manure fertilizer. It may be easier to to spread the chunks on a sheet of newspaper and break them apart with a fork. While the sawdust is still warm, 1/2 cup of powdered charcoal or flour may be added to increase its incendiary effect. Just add the powdered material to the warm mix and shake the bag. It is now ready to use. The bag can be lit with a match or delay ignitor. It will burn slowly at first, then faster, with an increasingly hot flame. Unless a large amount of raw wax and sawdust are available, commercial fire logs are the way to go. Even top-of-the-line logs cost less than 50 cents a pound and are much easier to fashion into explosives. The fire logs are common, innocuous, and may be purchased without question or comment, especially during fall and winter.