The spectroscopic and
optical characteristics of symbiotic stars are summarized. Long-term visual
(AAVSO) and photographic behavior of the symbiotic star, CI Cygni, is
discussed. The visual and the three color (blue, red, and yellow) photographic
light curves are all in phase. They are suggestive of both eclipsing binary and
eruptive type variations, with eclipses occuring 855 days apart, and eruptions
occuring direclty after each eclipse. The eruptions may be phase dependent.