TY - JOUR T1 - On the Inferences to Be Drawn from the Appearance of Bright Lines in the Spectra of Irresolvable Nebulae JF - Proceedings of the Royal Society of London (1854-1905) VL - 26 SP - 179 EP - 181 PY - 1877/01/01/ UR - http://dx.doi.org/10.1098/rspl.1877.0029 M3 - doi:10.1098/rspl.1877.0029 AU - Huggins, W. ER -