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The discussion following this example generated a sign
where both hands are held rather high, palms down, fingers spread;
and then the hands moving downwards without changing the spread
of the fingers. (This sign is closely related to the sign for
'rain', and the strings of rain resembles the field lines of
a force field). This would become the general sign for a force
field. A similar, but modified, sign would be used for horizontal,
homogenous fields. The 'homogenous' would be left out for most
uses, but if needed, it would be signed as "like through".
The sign describing the gravitational field of the Earth, would
be used to designate central fields.
The direction of movement would indicate the direction of
the force.
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