Large color-mixer, with horizontal rotating disks, connected with foot-machine / Apparatus for color-sense of the eccentric parts of retina, to be attached to Hering's foot-machine. After Hering, by Rothe, Prag

Anonymous. 1892. Harvard Psychological Laboratory in Dane Hall: Interior of a Laboratory Room. Photography

Psychological Laboratory, Harvard University. Cambridge (MA).

See the same device <link ref="tec2990">on another photograph</link> from this set.