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Optical arrangements of Koenig-Martens photometer. In the upper half of Fig. 1 the paths of the rays from two apertures,
Photograph of the Koenig-Martens photometer as modified in the instrument-shop of the Geophysical Laboratory. In this figure the following attachments are shown: (1) reflecting prism arrangement
Graphical solution of equation (5). In this chart the sloping lines represent the angles
Graphical solution of equation (7). In this diagram the abscissae represent the thickness of the plate, the ordinates the absorption in per cent. per centimeter, and the sloping lines the percentage transmission of the plate.
Optical arrangement of polarization photometer employing a calcite rhomb in place of the Wollaston cube of Fig. 1. In this figure
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