TY  - JOUR
T1  - On a Failure of the Law in Photography That When the Products of the Intensity of the Light Acting and of the Time of Exposure Are Equal, Equal Amounts of Chemical Action Will Be Produced
JF  - Proceedings of the Royal Society of London (1854-1905)
VL  - 54
SP  - 143
EP  - 147
PY  - 1893/01/01/
UR  - http://dx.doi.org/10.1098/rspl.1893.0060
M3  - doi:10.1098/rspl.1893.0060
AU  - Abney, W.
ER  -