Simultaneous contrast apparatus, with colored glasses. After Hering, by Rothe, Prag See the same device on <link ref="tec2993">another photograph</link> from the same set. See a color photograph of this device in the <link href='http://dssmhi1.fas.harvard.edu/emuseumdev/code/emuseum.asp?rawsearch=Number%2F%2C%2Fis%2F%2C%2FWJ0031%2F%2C%2F0%2F%2C%2F0'>Harvard Collection of Historical Scientific Instruments</link>. Simultaneous contrast apparatus, with colored glasses. After Hering, by Rothe, Prag

beta