Apothecary scale, with weights. By Whitall & Tatum, Boston, $12 [acc. to No. 202 in Münsterberg, 1893, Psychological Laboratory at Harvard University]
Source
Anonymous. 1892. Harvard Psychological Laboratory in Dane Hall: Interior of a Laboratory Room (Students studying the effect of attention on color perception). Photograph. (Harvard University Archives - HUPSF Psychological Laboratories (2))