Source : Webster's Revised Unabridged Dictionary (1913)

Gayley process \Gay"ley proc"ess\ (Med.)
   The process of removing moisture from the blast of an iron
   blast furnace by reducing its temperature so far that it will
   not remain suspended as vapor in the blast current, but will
   be deposited as snow in the cooling apparatus. The resultant
   uniformly dehydrated blast effects great economy in fuel
   consumption, and promotes regularity of furnace operation,
   and certainty of furnace control.