No. 3.
Object: To teach the use of combined sights.
Directions: As in No. 1, but half the firers will adjust sights 50 yards above and half 50 yards below the range given. Results will show two groups, which would be merged into one group of great depth in the case of fire of sufficient volume, such as that of two platoons, and illustrates the use of combined sights for increasing the zone of effective fire.