Abstract: A small article moving system is disclosed, having an upper plate spaced from a lower plate. The upper and lower plates each have vertically aligned guide channels. An article support rod is inserted into the guide channels at either end and is powered by two pivoting drive arms, each having an elongated slot. The slots intersect at a common opening through which the support rod lies. The arms can be controlled to vary the direction and speed of the rod through the channels.

Abstract: A greenhouse device or complex in which the roof, sidewall, front and rear sides of a lean-to-roof, saddle-roof or three-quarter type greenhouse is lined with an outside glass sheet and an inner glass sheet providing a double wall on all sides of the greenhouse. Warm air is generated in a warm air generator in which gaseous fuel/air mixture is combusted for heating the outside air and the heated air so produced is mixed with a relatively cool air to produce the warm air at a temperature suitable for plant growing. The warm air so obtained is then forced to flow through the double wall structure surrounding the sides and roof of the greenhouse. The air which has cooled may be used as said relatively cool air in the warm air generator.