The smoke generated from pyromix SW59-type and photoflash mixtures was compared to that generated by equal volumes of white phosphorus WP and titanium tetrachloride FM. WP smoke was superior to all smokes tested by a factor varying from two to 10 depending on which mix was evaluated. The FM smoke was equivalent to the smoke generated from a modified SW59 mixture and superior to the others. Light-green, brown- and blue-colored smokes were generated from the M3 smoke generator. A new mechanism for coloring the smoke emitted from this generator was devised. A miniature rapid-functioning oil smoke generator was demonstrated. It generated a cloud 40- to 50-feet-long and 10- to 15-feet-high in 3 seconds.