Fuel filter looks empty?

Hi,
A friend of mine has a '66 Sprite (that I gave him, now it looks better
than my Midget) that has the same low-looking fuel filter.  I think you
may be able to bleed the air out of it for a more full look.  But, as
long as the fuel touches the filter element, I think it will be absorbed
and sent up the line.
Cheers,
Derf