Abstract: The object of the invention is to provide a space saver ironing board that can be easily utilized and may be placed in any room of the house. In the closing position it is hung up on the wall and occupies a very small volume, comparable to that of a medium size picture (FIGS. 3 and 4). The opening movement is very simple and manageable: the space saver ironing board is rotated down from the wall until the horizontal working position (the figure), while it hanging on the wall. The rotation hinge is inserted into a fixed support wall bracket. The ironing board can be used in this position or unhooked from the wall and moved elsewhere (FIG. 5). Through the closing movement every part finds its proper position: one of the pair of legs (3) with their triangular cross-piece (5) provides the frame for the entire structure when in the closed position. The front panels (10) fixed to the underside of the legs cover the front of the structure (FIG.

Abstract: The present invention provides an optical instrument for measuring concentrations of polluting gases on long and short geometric paths. The apparatus comprises a telescope for focussing a ray of light into a spectrometer, a comparison cell containing a known concentration of a polluting gas, control means and an electronic apparatus adapted to determine the concentration of the polluting gas in the analytical sample.