ELECTRIC FIELD LINES
(Using Grass Seeds)

EQUIPMENT
    Small or Large Wimshurst machine
    Grass Seed Kit
   

NARRATIVE
            This kit shows Electric Field Lines due to electrostatic charges produced by the small Wimshurst machine. Place one of the 12 plates on the overhead projector. Position the connecting posts on the electrodes. 2 posts are needed for patterns 1 - 9 and 12; 4 posts for patterns 10 and 11. Connect the posts to the Wimshurst machine by means of two long chains. Sprinkle grass seeds onto the plate. Turn on the machine and lightly tap the plate with the small rubber mallet to facilitate the formation of the lines of force. Repeat for other patterns.

            (Small Wimshurst apparatus may need to be recharged before operating. Simply use silk and a glass rod to charge the front disk. Large Wimshurst does not need this attention.)