@echo off
cls
echo		  Representation of Electric fields
echo  .
echo  Press space bar to skip drawing of vortex.
echo  .
echo  Lines accurately represent lines of electric force between charges.
echo  The number of lines radiating from each point indicates its charge.
echo  The direction of rotation indicates its sign, e.g. clockwise = positive
echo  charge, counterclockwise = negative.  The closed lines represent
echo  lines of equipotential.  Note how the direction of movement of the
echo  equipotential lines are affected by sign of the charge.  Note also
echo  how the two families of lines always intersect at right angles.
echo  .
pause
maelstrm e L8