TY  - JOUR
T1  - Description of an Apparatus Employed at the Kew Observatory, Richmond, for the Examination of the Dark Glasses and Mirrors of Sextants
JF  - Proceedings of the Royal Society of London (1854-1905)
VL  - 35
SP  - 42
EP  - 44
PY  - 1883/01/01/
UR  - http://dx.doi.org/10.1098/rspl.1883.0007
M3  - doi:10.1098/rspl.1883.0007
AU  - Whipple, G.
ER  -