Abstract: A campfire support unit for burning firewood. The unit has a metal frame that includes a metal support ring with metal tabs and support legs. The frame is made and arranged to support wood for a wood fire in a near-vertical ring position around a central core which contains wood supported in a near-vertical position. An internal core fire is started, using wood placed inside the metal ring. Then wood is leaned against the outer rim of the metal ring. The tabs support the wood leaned against the outer rim, preventing it from falling before, during, and after the outer wood is ignited by the internal core fire.

Abstract: A campfire support unit for burning firewood. The unit has a metal frame that includes a metal support ring with metal tabs and support legs. The frame is made and arranged to support wood for a wood fire in a near-vertical ring position around a central core which contains wood supported in a near-vertical position. An internal core fire is started, using wood placed inside the metal ring. Then wood is leaned against the outer rim of the metal ring. The tabs support the wood leaned against the outer rim, preventing it from falling before, during, and after the outer wood is ignited by the internal core fire.

Abstract: A frame for a self-ventilated greenhouse, a self-ventilated greenhouse, and a method for controlling the air pressure between the layers of a double-layer roof for a greenhouse. The frame for the greenhouse comprises first and second parallel rows of upright sideposts; first and second sets of elongated, arcuate frame members; a plurality of cross-members hingedly connecting the sets of frame members; and means for separating and reuniting the sets of frame members. A roof for the greenhouse is provided by disposing first and second translucent sheets above the first and second sets of arcuate frame members, thereby conveting the frame into a greenhouse. The method comprises sealing the ends of a pair of sheets along their edges to form an inflatable pouch, disposing the sealed sheets above a frame to form a roof for a greenhouse, inflating the pouch, and controlling the pressure within the pouch with a back-pressure control valve.

Abstract: A self-ventilating greenhouse and frame therefor. The frame comprises a series of aligned sideposts connected to a series of partially overlapping frame members which support a translucent roof. The frame members are hingedly joined by a series of cross-members which guide the frame members as the roof is opened and closed by means of a worm gear or a rack and pinion.