TY  - JOUR
T1  - A New Hypothesis concerning Vision. 
JF  - Proceedings of the Royal Society of London (1854-1905)
VL  - 54
SP  - 272
EP  - 274
PY  - 1893/01/01/
UR  - http://dx.doi.org/10.1098/rspl.1893.0073
M3  - doi:10.1098/rspl.1893.0073
AU  - Haycraft, J.
ER  -