TY - JOUR T1 - On the Determination of the Indices of Refraction of Various Substances for the Electric Ray. I. Index of Refraction of Sulphur JF - Proceedings of the Royal Society of London (1854-1905) VL - 59 SP - 160 EP - 167 PY - 1895/01/01/ UR - http://dx.doi.org/10.1098/rspl.1895.0069 M3 - doi:10.1098/rspl.1895.0069 AU - Bose, J. ER -