TY  - JOUR
T1  - Circular concerning Astronomical Photography
JF  - Proceedings of the Royal Society of London (1854-1905)
VL  - 35
SP  - 260
EP  - 261
PY  - 1883/01/01/
UR  - http://dx.doi.org/10.1098/rspl.1883.0044
M3  - doi:10.1098/rspl.1883.0044
AU  - Pickering, E.
ER  -