Abstract: Blocks are provided which can be assembled to form a wall without the use of skilled labor. The blocks are assembled with an adhesive caulk, which forms a watertight gasket around the wall. This design can withstand winds and earthquakes better than a standard block wall. The standard block includes a rectangular block portion, a rear face portion, and a front face portion. The face portions are recessed from the top surface of the rectangular block portion and project down from the bottom surface of the rectangular block portion. Of course, the use of the terms bottom and top are relative, and the wall could be assembled with all the blocks upside-down.

Abstract: A solar energy collection device includes an oblong pedestal with a heat absorbing hollow cylinder carried upon the pinnacle of the pedestal through which a heat absorbing fluid is moved. A transparent, generally cylindrical member is carried by the pedestal and encircles at least a portion of the cylinder for concentrating and transferring radiant energy incident to the periphery of the member to the heat absorbing cylinder, and thence to the fluid passing therethrough.