Table 2. Vertical and horizontal components of speed and acceleration for Lycopodium spores drifting near a metal hummingbird model with two different charges, and when uncharged.

Data indicate mean values ± one standard deviation.

trial	speed (mm/s)		acceleration (mm/s2)
	horizontal	vertical	horizontal	vertical
490 pC (n = 5)	13 ± 4	-25 ± 6	-82 ± 95	140 ± 6
840 pC (n = 5)	13 ± 3	-32 ± 6	163 ± 52	168 ± 6
uncharged (n = 10)	-6 ± 6	-34 ± 13	-4 ± 52	95 ± 88