Abstract: Buildings which include rudimentary plumbing can be transported as a set of disassembled modular parts and then assembled on site. The assembled building includes a water reservoir in the roof and a sewage reservoir in the base, so as to enable gravity-based water supply and sewage disposal in the absence of traditional plumbing and sewage infrastructure. Building envelope elements having internal reservoirs, and methods for constructing such building envelope elements are also described.

Abstract: Buildings which include rudimentary plumbing can be transported as a set of disassembled modular parts and then assembled on site. The assembled building includes a water reservoir in the roof and a sewage reservoir in the base, so as to enable gravity-based water supply and sewage disposal in the absence of traditional plumbing and sewage infrastructure. Building envelope elements having internal reservoirs, and methods for constructing such building envelope elements are also described.

Abstract: Buildings which include rudimentary plumbing can be transported as a set of disassembled modular parts and then assembled on site. The assembled building includes a water reservoir in the roof and a sewage reservoir in the base, so as to enable gravity-based water supply and sewage disposal in the absence of traditional plumbing and sewage infrastructure. Building envelope elements having internal reservoirs, and methods for constructing such building envelope elements are also described.

Abstract: Buildings which include rudimentary plumbing can be transported as a set of disassembled modular parts and then assembled on site. The assembled building includes a water reservoir in the roof and a sewage reservoir in the base, so as to enable gravity-based water supply and sewage disposal in the absence of traditional plumbing and sewage infrastructure. Building envelope elements having internal reservoirs, and methods for constructing such building envelope elements are also described.

Abstract: A new book holder comprises two book receiving members and a connecting member which connects the two book receiving members together so that they can move toward and away from one another between two positions to hold respectively a small width book and a maximum width book. Each receiving member has a post member on its upper surface carrying a respective page engaging member pivoted thereon and spring biased to be movable between a position in which it contacts the surface of the respective book receiving member, and one in which it can contact the upper surface of the uppermost page of a book resting on the book receiving member. Preferably each page engaging member is of U-shape and is of springy wire material, so that it can flex to assist in urging the page engaging member into contact with the holder surface. The parts of the page engaging members in the posts may comprise torsion springs as part of the spring means.