TY  - JOUR
T1  - On a Sun-Spot Observed August 31, 1880
JF  - Proceedings of the Royal Society of London (1854-1905)
VL  - 31
SP  - 72
EP  - 72
PY  - 1880/01/01/
UR  - http://dx.doi.org/10.1098/rspl.1880.0010
M3  - doi:10.1098/rspl.1880.0010
AU  - Lockyer, J.
ER  -