cts. The two plates can obviously be placed one sculpture" chosen by its inventor. ated illumination is made to strike the -model to be above the other so as to accurately register. When Toward the end of last century Selke inaugurated reproduced in the shape of a plastic photograph. If inspecting… … model by photographic means alone is indeed a hope^ reproducing each to a given depth of relief, viz., about one-half inch. A convenient combination of the reliefs less task. And yet the chief element which. enters Revolving Disks Used to Intercept tbe Light. into the present solution of the…
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