Abstract: The invention is concerned with a method of biologically decomposing organic material by the action of microorganisms thereon in the presence of an oxygen-gas containing medium, in which method the material is charged to the top of a vessel and caused to sink downwardly therethrough while passing one or more zones during continuous decomposition of the material and discharge of the treated material at the bottom of said vessel, the oxygen-gas medium being charged to the bottom of the vessel and caused to move upwardly therethrough against the pressure of the overlying material, wherein the sinking movement of said material is effected by causing one or more rotatable screws to cut and finely-divide the treated material and to transport said cut and treated material to a discharge location in the lower part of the vessel; and wherein the oxygen-gas containing medium is introduced through gas-supply means in the bottom part of the vessel and caused to pass through a layer of particulate material and through a l

Abstract: This disclosure relates to apparatus for waxing skis comprising a gas burner assembly adapted to be connected to a can of gas, and a waxing iron releasably attached to the gas burner assembly by means of a quick connect-disconnect device including a resilient snap element. The waxing iron includes a bottom plate having a convex configuration whereby only a limited portion of the surface area thereof may contact the surface of a ski thereby preventing burning of the ski or the wax being spread thereon.