(Downloading may take up to 30 seconds.
If the slide opens in your browser, select File -> Save As to save it.)
Click on image to view larger version.

Fig. 2. Top view of a coil system and magnetic vectors. Both training and testing
took place in the centre of a four-coil system that produced magnetic fields
that differed in alignment by 90°. The two fields had a horizontal
intensity of 20 µT and an inclination of 65°. The black light shield
was placed between the observer and the test arena. N1 and
N2 are the directions of the experimental fields; N is the
direction of the local natural field.