Abstract: A compact atomic absorption analyzer includes a xenon flashlamp, processing circuits, optics, electronic heating apparatus and a photomultiplier. A sample to be tested is heated using electronic (radio frequency) heating apparatus within the optics to subject the sample to thermal energy sufficient to excite the element of the sample to a level at which it will radiate its characteristic line-emission spectra. A high intensity background light having an ultraviolet component is generated by the xenon flashlamp within the optics and this spectral distribution of this light is received by the photomultiplier. The output of the photomultiplier is processed by the processing electronics, with the results of the test displayed, stored and/or downloaded to an external computer or printer.

Abstract: An assembly for displaying panels, for example, a picture frame, comprises a frame member having a display opening therein. The frame member has a front face, which is the face facing a viewer looking at the panel or picture displayed in the frame member, and an opposite rear face. A rearwardly facing peripheral shoulder is formed about the perimeter of the display opening so that the size of the display opening in the rear face is larger than its size in the front face. A flexible back closure member is affixed by tongue and groove locking formations across the rear of said display opening to maintain panels (e.g., a glass panel, a picture, and a backing board) within said display opening with the peripheral portions thereof seated against the peripheral shoulder.