  This paper gives similarity transformations for laminar film condensation on
a vertical flat plate with variable temperature distribution and finds
analytical solutions for arbitrary Prandtl numbers and condensation rates. The
work contrasts with Sparrow and Gregg assertion that wall temperature variation
does not permit similarity solutions. To resolve the long-standing debatable
issue regarding heat transfer in the non-isothermal case, some useful
formulations are obtained, including a significant dependence of varying
Prandtl numbers. Results are compared with the available experimental data.
