A heat fumigation apparatus for transpiring a solution of a chemical agent dissolved in a solvent by heating which comprises a container having the solution therein, a wick a part of which is immersed in the solution and a heater for heating the upper portion of the wick thereby transpiring the solution...http://www.google.es/patents/US4968487?utm_source=gb-gplus-sharePatente US4968487 - Heat fumigation apparatus
