TY - JOUR T1 - Comparison of the Spectra of Nebulae and Stars of Groups I and II with Those of Comets and Aurorae JF - Proceedings of the Royal Society of London (1854-1905) VL - 47 SP - 28 EP - 39 PY - 1889/01/01/ UR - http://dx.doi.org/10.1098/rspl.1889.0064 M3 - doi:10.1098/rspl.1889.0064 AU - Lockyer, J. ER -