Anonymous. 1892. Harvard Psychological Laboratory in Dane Hall: Instruments for Experiments on Sight. Photograph. (Harvard University Archives - HUPSF Psychological Laboratories (7))
The tubular device behind the reading glass could possibly be a Rose Chromatophotometer with the mirror and base hidden and the instrument facing us as it is seen in this photograph. It might as likely be a simple Microsope since there is no Rose Chromatophotometer in Muensterberg’s list.