Second: Set the little lever-arm at the azimuth of the line of fire.
Third: At the point on the lever-arm reading the velocity of the wind as determined by the anemometer, run the finger or a pencil along the nearest line toward the arrow, and where this line cuts the arrow is read the longitudinal component or the component in the direction of the line of fire.
Fig. 74.
Q. How are the wind components determined by the "new method"?
A. 1o target-pointer to velocity of wind on target-arm.
2o Set ring to azimuth of wind.
3o Set target-arm to azimuth of gun.
4o Components are now read on the dial from the point indicated
by the target-pointer. (See Fig. 75.)