TY  - JOUR
T1  - On the Method of Examination of Photographic Objectives at the Kew Observatory. 
JF  - Proceedings of the Royal Society of London (1854-1905)
VL  - 52
SP  - 1
EP  - 4
PY  - 1892/01/01/
UR  - http://dx.doi.org/10.1098/rspl.1892.0043
M3  - doi:10.1098/rspl.1892.0043
AU  - Darwin, L.
ER  -