TY - JOUR T1 - On a Cause for the Appearance of Bright Lines in the Spectra of Irresolvable Star-Clusters JF - Proceedings of the Royal Society of London (1854-1905) VL - 26 SP - 517 EP - 519 PY - 1877/01/01/ UR - http://dx.doi.org/10.1098/rspl.1877.0072 M3 - doi:10.1098/rspl.1877.0072 AU - Stone, E. ER -