This lantern for the detection of color blindness can be seen under William Thomson‘s portrait in the College of Physicians of Philadelphia. This model was made in 1907 “for railway & marine service”. The item was donated to the College by Dr. Burton Chance.
- Photos by Luca Borghi ti.supmacinu|ihgrob.l#| (June 2017), courtesy of Chrissie Perella, archivist, on behalf of the CPP.
- Locate the item on this Google Map
Bibliography
- Julie S. Berkowitz, The College of Physicians of Philadelphia. Portrait Catalogue. With photographs by Rick Echelmeyer, College of Physicians of Philadelphia, Philadelphia 1984, pp. 210-2.



