Abstract: A solar boiler having a heat receiver element which substantially tracts the path of the sun for utilizing solar energy to heat a fluid passing through the boiler. A lens system is mounted on the upper portion of the heat receiver and concentrates the rays of the sun directly onto the upper surface of the receiver. Also included is a means for tilting the heat receiver in response to the apparent movement of the sun along its arcuate path. In addition, a base assembly is connected to the tilting means and is adapted for rotating the heat receiver in a substantially horizontal plane such that such rotation, in combination with the tilting movement, maintains the heat receiver in proper alignment with the rays of the sun.

Abstract: A floating wall container for holding liquids having a specific gravity less than that of water, the container being suitable for inland storage or liquids such as oil in lowland or march areas, or wherever there is a constant supply of water, the container being held in position by pilings, and buoyed by floating barges in a cavity dredged for this purpose.