http://www.indiana.edu/~issgraph/crandall.html (http://www.indiana.edu/~issgraph/crandall.html)
(Requires quicktime.)http://www.cornell-iowa.edu/tlt/teach/chem/fractional_distillation/fractional_distillation1.html (http://www.cornell-iowa.edu/tlt/teach/chem/fractional_distillation/fractional_distillation1.html)